Don't know. Always starting clean (with placing back the backup from Google drive once a year with a new version and then do all these steps
https://wiki.lineageos.org/devices/alioth/install/variant1 including factory reset). I have 2 Poco F3's available (always good to have a backup if one gets stolen, or I dive into the water with it or something) and switch them every year (that's why I can now test without any problems because my other phone still on 19.1 is still my main).
But just had 19.1 on the device everything worked great fingerprint wise. Now did only adb sideload LOS20.zip and Gapps13.zip, factory reset and setup fingerprint which will work untill reboot then no fingerprints are stored anymore.