I can confirm this. After flashing kernel, FPR doesnt work anymore. I cannot provide logs, just want to give a hint that its also happening with my device.Not for me, unlock with pin (due to it not recognising fingerprint) then lock and try to unlock and it fails over and over again, have flashed back to flar and don't experience the issue.
Not sure of the interaction between the kernel and the fingerprint sensor but the kernel is the only variable for me, stock (although with magisk) OOS.