hi team

So i have an issue where I am boosting around 0.7bar yet randomly up to 1.0 bar.
Car is a 1.8tq forge007 dv, n75h, intake, 2,5 exhasut, and im sure i should be holding 1 bar as it is chipped.

video attached but its from my phone so excuse the quality


wondering if im sopposed to have -1bar vacum? before i switched to the forge dv it wasnt as low maybe around -5.

thanks in advance and i hope one of you can help!