Amazon Dash Button Channel lost after some time

Dear all,

I am using an Amazon Dash Button to trigger a simple rule to turn on one light. So nothing fancy. The Button is online and working, but after some time the rule stops working. After some analysis I realized that somehow the Dash Button Thing lost its channel and thus no event has been triggered in the first place (see Screenshot). The Thing is online, but without any channel.

I had to remove the thing and the binding and reinstall everything. Then the dash button is discovered again and the channel is back. This already happened several times.

I am on Openhabian 2.2 running on a RPi 3.

Did anyone experience this behaviour, too? Thanks a lot.