I have two POS locations and 3 registers. They each have a Chip and Tap credit card reader.
ALL THREE of them simultaneously stopped reading chips and must be put in manually. The tap does work.
I've unpaired. Forgotten. Rebooted. Everything. Many times. Re-paired.
The device is recognized and shown as connected by the POS.
Same result. Chip reader doesn't work. Only tap. For all 3 of them.