My 1+ year review of Fairphone 3

[Alex.A]

I believe I read somewhere on the forum that putting a piece of tape over the fingerprint sensor helped, if it can help you.
Here’s a testimony:

My FP3 Fingerprint sensor is working so badly it's basically completely useless

I have problems too and use the sensor in different apps. I put on strip tesa on the sensor. Now it works great (recognition rate 95%) Unconventional but cheap Maybe the sensor is too sensitive. Have a try. Maybe it works on your phone too.