MMI Problems

RS4 2018 build date.
My MMI would randomly reboot itself with anything from several days to 2 or 3 minutes between reboots.
It has now reached a point that it practically continues to reboot itself all the time.

The current version is MHI2Q_ER__AUG22_P5092, MU Software 1329

If I do a VCDS Applications, Optical Bus Diagnostic. I get a fail or this test may not be supported responce.
I think I have a CAN Gateway fault and have a second hand module on its way but I'm gathering as many pearls of wisdom I can get before it arrives.
For example am I getting the correct responce from the Optical Bus test? Is it faulty or is that test not actually supported on my car.

Many thanks in advance.

A VCDS scan report highlights below:

Code:

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Address 19: CAN Gateway (J533)      Labels:* None
  Part No SW: 8W7 907 468 F    HW: 8W7 907 468 E
  Component: Gateway      H42 0123 
  Revision: 7C000001    Serial number: 0187C823318414 Dataset Number: 8W0909515J  0059
  Coding: 03010001000086405407000000590012E8980007900000000175078E10000000
  Shop #: WSC 06335 790 00001
  GVL: 01583C580800020040DC08000002C800110C0000000000000000000000000000
  ASAM Dataset: EV_CGateCONTIAU491 003111
  ROD: EV_CGateCONTIAU491_003_AU49.rod
  VCID: 4EC66454705BBB3ACD7-801A

  Multifunction steering wheel control module:
  Subsystem 1 - Part No SW: 8W0 951 523 F    HW: 8W0 951 523 F
  Component: J453 MFL  H04 0004
  Serial number: 20180411121146 20913

  Battery Monitoring Control Module:
  Subsystem 2 - Part No SW: 8S0 915 181 C    HW: 8S0 915 181 C
  Component: J367-BDMHella  H10 9070
  Serial number: 6664487304         

3 Faults Found:
2563 - Cellular Antenna
          B1053 13 [008] - Open Circuit
          [GSM/UMTS_Breakdown]
          Intermittent - Confirmed - Tested Since Memory Clear
            Freeze Frame:
                    Fault Status: 00000001
                    Fault Priority: 4
                    Fault Frequency: 5
                    Reset counter: 134
                    Mileage: 121925 km
                    Date: 2023.09.24
                    Time: 09:14:43

                    Voltage terminal 30: 12.40 V

131723 - Body Control Module (Central Electric 2)
          U0141 00 [008] - No Communications
          [Timeout_Node_0x8B_DiagAdress_46_BCM2]
          Intermittent - Confirmed - Tested Since Memory Clear
            Freeze Frame:
                    Fault Status: 00000001
                    Fault Priority: 4
                    Fault Frequency: 1
                    Reset counter: 131
                    Mileage: 126636 km
                    Date: 2023.10.05
                    Time: 09:05:05

8531970 - Quiescent Current
          U1406 00 [008] - Too High
          [Electric_current_Upper_Limit_Value_Exceeded]
          Intermittent - Confirmed - Tested Since Memory Clear
            Freeze Frame:
                    Fault Status: 00000001
                    Fault Priority: 6
                    Fault Frequency: 2
                    Reset counter: 128
                    Mileage: 121643 km
                    Date: 2023.09.16
                    Time: 13:00:40

                    Total static current-current total quiescent current: 95 mA
                    Total static current-Total time quiescent current exceeded: 1.0 H
                    EM_vehicle_state: 00 00

Address 29: Left Light (J1018)      Labels: 4M0-907-397.clb
  Part No SW: 4M0 907 397 AD    HW: 4M0 907 397 D
  Component: LCM_MLBevoH05 0024 
  Dataset Number: 8W0909519B  0010
  ASAM Dataset: EV_LCMLeftHELLAAU736 001012
  ROD: EV_LCMLeftHELLAAU736_VW48.rod
  VCID: 79ACE7889955CC82485-802C

1 Fault Found:
0768 - Local Databus
          U1030 00 [008] - Electrical Malfunction
          [lin data bus defect]
          Intermittent - Confirmed - Tested Since Memory Clear
            Freeze Frame:
                    Fault Status: 00000001
                    Fault Priority: 4
                    Fault Frequency: 1
                    Reset counter: 124
                    Mileage: 124485 km
                    Date: 2023.09.29
                    Time: 11:18:58

Address 46: Central Conv. (J393)      Labels:* None
  Part No SW: 8W0 907 064 EC    HW: 8W0 907 064 DC
  Component: BCM2 MLBevo  025 0387 
  Dataset Number: 8W0909501J  0052
  Coding: 013500002FB100406309A0006E00080233004010804306502F0400000504803F001F0001000000
  Shop #: WSC 06335 790 00001
  ASAM Dataset: EV_BCM2HellaAU736 014014
  ROD: EV_BCM2HellaAU736_014_AU49.rod
  VCID: 015C8F68F1859442005-8054

  Anti-theft alarm system sensor:
  Subsystem 1 - Part No SW: 5Q0 951 177    HW: 5Q0 951 172
  Component: Sensor, DWA  005 0316
  Serial number: 000000000ZY180743EV2

  Alarm horn:
  Subsystem 2 - Part No SW: 5Q0 951 605 A    HW: 5Q0 951 605 A
  Component: Sirene, DWA  005 0314
  Serial number: 00000000000099646613

  Rear lid opener control module:
  Subsystem 3 - Part No SW: 3AA 962 243 H    HW: 3AA 962 243 H
  Component: GEB.F.Heckoef  H16 0905
  Serial number: 12005980           

1 Fault Found:
65896 - Databus
          U1121 00 [008] - Missing Message
          [Climatronic control module: Klima_03: no signal/communication]
          Intermittent - Confirmed - Tested Since Memory Clear
            Freeze Frame:
                    Fault Status: 00000001
                    Fault Priority: 6
                    Reset counter: 142
                    Mileage: 120978 km
                    Date: 2023.09.13
                    Time: 14:40:31

                    Supply voltages-Terminal 30 power supply: 13.071 V
                    Supply voltages-Supply voltage Terminal 30 - 2: 13.071 V
                    Supply voltages-Supply voltage Terminal 30 - 3: 13.044 V
                    general_additional_freeze_frame-Ambient_temperature_not_filtered: -50.0 �C
                    general_additional_freeze_frame-coprocessor_spi_status: 00000000
                    general_additional_freeze_frame-dataflash_status: 00000000
                    general_additional_freeze_frame-interior_temperature: -50.0 �C
                    general_additional_freeze_frame-Operating_Status: 00000000 00000000
                    general_additional_freeze_frame-production_mode: not active
                    general_additional_freeze_frame-reset_cause: 00000000
                    general_additional_freeze_frame-Reset_counter: 0
                    general_additional_freeze_frame-Stall_current_cutoff_level: Deactivation stage 0
                    general_additional_freeze_frame-Stall_Current_Measuring_Mode: not active
                    general_additional_freeze_frame-subnetwork_status: 00000000 00000000
                    general_additional_freeze_frame-terminal_control_intern_status: 40 04 5A 12 02 98
                    general_additional_freeze_frame-Transport_Mode: not active
                    general_additional_freeze_frame-Vehicle speed: 0.00 km/h
                    can_lin_communication_freeze_frame: 00000000 00000000 00000000 00000000

Address 5F: Information Electr. (J794)      Labels:* 8W0-035-MIB-HGH2.clb
  Part No SW: 8W5 035 035 C    HW: 8W5 035 035
  Component: MU-P-LND-EU  034 1329 
  Serial number: A829D0JB065237 Dataset Number: 8W0909545VM 0004
  Coding: 019462010000000053111102000A00332F000BE701700100DE
  Shop #: WSC 06335 790 00001
  ASAM Dataset: EV_MUHig6C3Gen2HBAS 001115
  ROD: EV_MUHig6C3Gen2HBAS_AU49.rod
  VCID: 372821B0EFC11AF2FE1-8062

  Data carrier:
  Subsystem 1 - Part No SW: V03 959 802 TL    HW: -----------
  Component: ECE 2020/2021  --- 0187
  Serial number: --------------------

  Multimedia System 1:
  Subsystem 2 - Part No SW: 8W8 919 605    HW: 8W8 919 605
  Component: DU High AU49x  H32 0170
  Serial number: TPO00114111700820328

  Multimedia system control head:
  Subsystem 3 - Part No SW: 8W0 919 614 T    HW: 8W0 919 614 T
  Component: ControlUnit_H  H30 0206
  Serial number: APVAK121031800040304

  Compact disc data bank:
  Subsystem 4 - Part No SW: V03 959 800 EG    HW: -----------
  Component: Gracenote2  --- 1016
  Serial number: --------------------

3 Faults Found:
3086 - Antenna for Telephone Mount
          B1564 01 [009] - Electrical Failure
          Confirmed - Tested Since Memory Clear
            Freeze Frame:
                    Fault Status: 00000001
                    Fault Priority: 4
                    Fault Frequency: 1
                    Reset counter: 66
                    Mileage: 120976 km
                    Date: 2023.09.13
                    Time: 14:34:43

                    Voltage terminal 30: 14.8 V
                    Status of telephone-Antenna diagnostic: OK
                    Status of telephone-Telephone baseplate diagnostic: not connected
                    Status of telephone-Handset in handset holder (cradle): not selected
                    Status of telephone-Handset holder (cradle): not connected

6669 - Optical Data Bus for Digital Sound System
          U10CC 00 [008] - Intermittent Disruption
          [Optical data bus: sporadic open circuit in sound]
          Intermittent - Confirmed - Tested Since Memory Clear
            Freeze Frame:
                    Fault Status: 00000001
                    Fault Priority: 7
                    Fault Frequency: 1
                    Reset counter: 131
                    Mileage: 126247 km
                    Date: 2023.10.04
                    Time: 12:55:12

                    Voltage terminal 30: 12.5 V
                    Temperature of MOST transceiver-max.value: -50 �C
                    Temperature of MOST transceiver-min.value: -11 �C
                    Temperature of MOST transceiver-Up-to-date: 48 �C

6672 - Optical Data Bus for Display in Instruments
          U10CF 00 [008] - Intermittent Disruption
          [Optical data bus: sporadic open circuit in instrument cluster display]
          Intermittent - Confirmed - Tested Since Memory Clear
            Freeze Frame:
                    Fault Status: 00000001
                    Fault Priority: 7
                    Fault Frequency: 10
                    Reset counter: 142
                    Mileage: 123619 km
                    Date: 2023.09.26
                    Time: 17:25:20

                    Voltage terminal 30: 14.0 V
                    Temperature of MOST transceiver-max.value: -50 �C
                    Temperature of MOST transceiver-min.value: -11 �C
                    Temperature of MOST transceiver-Up-to-date: 47 �C

Address 65: Tire Pressure (J502)      Labels: 4M0-907-273.clb
  Part No SW: 4M0 907 273 B    HW: 4M0 907 273 B
  Component: RDKHUFAU736  H04 0010 
  Serial number: 30000000017278 Dataset Number: 8WA909850A  0002
  ASAM Dataset: EV_RDKHUFAU736 002007
  ROD: EV_RDKHUFAU736.rod
  VCID: 2F3819D01791D232A61-807A

1 Fault Found:
8390147 - Tire Pressure Monitoring
          C10DC 54 [008] - Missing Calibration / Basic Setting
          Intermittent - Confirmed - Tested Since Memory Clear
            Freeze Frame:
                    Fault Status: 00000001
                    Fault Priority: 6
                    Fault Frequency: 1
                    Reset counter: 115
                    Mileage: 121814 km
                    Date: 2023.09.19
                    Time: 14:30:25

                    Expanded ambient data 1-Left front tire pressure sensor: identification: 560360898
                    Expanded ambient data 1-Right front tire pressure sensor: identification: 560350137
                    Expanded ambient data 1-Left rear tire pressure sensor: identification: 560360910
                    Expanded ambient data 1-Right rear tire pressure sensor: identification: 557570184

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