Autohold/traction control issue

Hi, I’m having an electrical issue in my 18’s stinger gt2 since I had a job done (dash out for the heater core). When I press one of these 2 buttons (tc off or autohold), they are doing random things. They’re not inverted or not working, just acting radndomly between both of them. Sometime after a few random actions, my epb light turns on and stays on for only the rest of the drive, after a quick reset, its fine again until I press one of these 2 buttons. The epb is working fine, it doesn’t seems to code even if I use it many times, I cannot replicate the issue with only that button. I already tried to swap the module with a brand new oem one from kia (450$ parts), but I’s sadly having the same issue. I think it might be a connector somewhere in the dash just inverted or plug in on the wrong side, did anyone that got a stinger dash out had that issue in the past, or have any idea? Thanks everyone.