Cadance no longer being reported on Neo Bike

Hi, I have had the bike since November and been happy with it.

It is updated to the latest firmware.

Unfortunately the RPM is no longer being reported. This is both on the bike display and on apps. Zwift seems to lock on at around 65rpm but Garmin reports 0.

Tacx training also reports 0 and I have tried Bluetooth and Ant+ connections.

Any help will be greatly appreciated. Thanks