Once again I sit down at my desk, when Touch ID would normally fail on me, and it works perfectly. I don't know what Apple did but I'm feeling confident that it's fixed.
My only guess is that it was a result of one of these background updates: https://support.apple.com/en-us/HT207005
Under "System Data Files" they list these as some things that can update in the background without the device rebooting:
My only guess is that it was a result of one of these background updates: https://support.apple.com/en-us/HT207005
Under "System Data Files" they list these as some things that can update in the background without the device rebooting:
Since it seems like the firmware version didn't change, I am guessing that some sort of Bluetooth update was released silently. Dunno!
- Improved discovery of Bluetooth devices and communication with them
- Firmware updates for built-in trackpads and external trackpads, mice, keyboards, and displays