Hi everyone.
Have a 1L that keeps sticking on as well, beat the little bugger with the handle of a scewdriver, and we are gold for a few days and then remains on agin!! Reseting has no effect other than a few well placed taps to the unit. Not really what I had in mind when I bought them.
Also have issues with two others, when connected to the Shelly cloud, just keeping turning back on when turned off. Remove the cloud part of the equation and they work. Kinda defeats the idea I guess, but shall try Home Assistant going forward which was my original plan.