Ikea Somrig E2213: no actions in zigbee2mqtt

I bought 2 somrig shortcut buttons some months ago.
One of it is used since then without any problems.
Some hours ago I tried to get the second one running:
Pairing works and I also updated the ota firmware but no button presses are recognized.

There are other users with the same problem. It just seems weird to me that one is working and the other one isn’t.
It may point to a problem while interviewing with newer firmware version:

Is there any chance I can downgrade the remote? I did not understand the downgrade instructions on the z2m website.

Same as above, but send the message to zigbee2mqtt/bridge/request/device/ota_update/check/downgrade instead.
OTA updates | Zigbee2MQTT

Not sure what to do and how to find a downgrade file from IKEA?