I've got a pixel 9 pro XL with build # 2026081301 with the beta channel option for updates (it was on stable when this started however).
The fingerprint scanner will randomly stop registering a press aside from the text saying to press more firmly. If I restart the phone the fingerprint scanner completely disappears from the menus. If I restart it after that it might randomly come back (complete with saved finger prints still working) for a while before it'll stop working again. There's no reliable method to get it back. I've tried restarting, powering off the phone for several minutes at a time, and starting fast boot mode and no them gets different results. The only guarantee is if restart it enough times eventually it'll start working again.