Boot looping after screen replacement

This has happened to me several times. I am very frustrated. Whenever I test the new screen without the front camera flex plugged in the phone boots perfectly fine. Once I plug in the camera flex it’s starts to bootloop. And no matter how many new FCAM flex’s I try it continues to bootloop until I put the original screen back on with the original FCAM.

Could this be a software issue? I have inspected the flex cables and there are no tears, they are also brand new.

Please help!!