Replacement fingerprint sensor half works

[Laniakea]

Hello, I replaced the fingerprint sensor on my phone with a replacement, THIS one. Weird thing is it works very good until I try to unlock the phone with a non-registered finger and instead of letting me try again, it stops working altogether. It works again only after I disattach the sensor from the motherboard and plug it back again, btw rebooting, shutting down and booting again doesn't work at all. Is it because of the phone or sensor? And how could it start working again after deattaching it? Like what changes? And obviously, how can I fix it? Thanks ^-^

 

Edit: Phone is Huawei P8/P9 Lite 2017  PRA-LX1

[LogicalDrm]

-> Moved to Troubleshooting