Hi, I just found out that my openhab instance completely loses outbound TCP connections when the issue appears. E.g. It stops updating the date and time object as well as not being able to send updates to the Shellys. The Debian itself is not affected as I can ping external adresses fine and SSH / telnet is working as well… So thanks for trying to troubleshoot the Shelly issue but it is obviously related to something different.
The handler is already disposed message can be fixed by simply restarting the whole device. Binding reset or openhab service restart doesn’t do the trick for me.