I have several of the HS220 smart dimmers in my home, they were installed a few years ago and have worked very well until now with recessed LED lights.  The last several weeks, I have noticed a flicker from a few of the switch locations.  Mostly, the flickering instances were minimal so did not pay it much attention, like it would flicker and if you weren't paying attention you might have missed it.  But a couple of times, the flickering would be continuous where I had to turn the lights off.  After leaving the lighs off for a bit then turning them back on some time later, the continuous flickering issue went away, but it seems to come back somewhat randomly.

I have verified connectivity of the lights and switches and they are fine, so it is not a wiring issue.  I did have another non dimmer smart switch HS200 go bad a couple months back but that one was much more obvious in that the flickering never stopped and even the indicator on the switch itself was flickering non stop.  That is why I am suspecting this is another hardware/software issue with the HS220.

As far as troubleshooting, I have reset the switches and that does not fix the intermittent flickering.  I have also redone the calibration a few times. The flickering appears on only some swtiches and the frequency is not predictable.  Sometimes it is worse than others.

Is this a known issue with the HS220, and would there be a firmware update that would fix this issue?