Fibaro Dimmer 2 sudenly not responding

All was good with my Fibaro Dimmer.

But recently it has stopped being controllable from Smartthings. It reports its states e.g. on , power draw. And I can turn it off in the ST app but not back on.

Some times turing it on at the switch doesn’t trigger routines linked to that action.

Any one else seeing this issue?

I think doing a z-wave repair may have resolved my issue