Background - my dev device has been sitting in its box for a while (spare one). last week I turned it on as I wanted to get some things moving with POS Bridge. The devices booted fine and everything worked - no errors etc.
Then I got a notification to upgrade (since it had not seen a network and not upgraded in over a year). Upgrade went ahead, installed no issues. When I booted the device up, I got the error that the card reader was broken - red warning as if the chip/card reader was compromised.
Now I have never used the card reader on the device - there was no card inserted or tapped at all. There was no such error before the upgrade.
Any thoughts or ideas? Is this a software issue? Can I restore to some older firmware?