GT DD PRO shifting doesn't work

in Gran Turismo
Hello
Recently i've been playing GT7 but when i try to upshift it doesn't register. If i bind upshift with any other button it works perfectly. Wich makes me believe there is something wrong with my shifter paddle.
Yet in the Fanatec software and on other games(F1 & Assetto Corsa) i can't seem to replicate the issue.
Does anyone have the same problem? Or a solution?