I know it will ask for my PIN if I restart the tab, but I haven't even touched it. I'll put it down for a while, then when I come back to it, instead of allowing me to use my fingerprint, it asks for PIN after restart. It's doing this every time I leave the tab for a longer period of time.
Thanks for your reply. I understand it will ask for my PIN every few days as my S21 does this, but this is happening several times a day and it says use PIN after restart, when I haven't restarted it.