Swim 2 displays accelerometer data and other weird stuff

My Swim 2 displays weird data like accelerometer and magnetometer data and some other strange screen I have never seen before.

This happened after charging the battery and right after disconnecting the watch from the cable. I've tried to switch off and on the watch these weird data are still there after a power cycle.

Does anyone know how to get the watch to its standard operation? I would say these screen are for testing/calibration/repairing operations.

Many thanks!