Any know problems with fingerprint?

I used an old Samsung Galaxy S8+ for my first tries with e/OS. Actually I was happy beside the fact, that it was not possible to add my fingerprint. OK, I thought this is a very old smartphone. perhaps the sensor is abit demaged.
So I bought a very good OnePlus Nord and installed e/OS, too…
After setting up WLAN I tried to set up my fingerprint and again it does not word… btw I tried this process with original OnePlus image and here it worked… so the sensor is fine.
Any hints regarding e/OS and fingerprints??
many thanks
Karl

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