I assume you are using these via the HACS add on so your meross devices are still hosted / accessible via the web.
Any chance those your rad motor is the MTS150 or MTS150H?
I have 4 meross switches and the way I tied them into HA is via Homekit controller (the 4 switches I have were Homekit compatible)
Just a thought but if you have the homekit capable devices you could add them to HA that way. I have had no issues thus far with mine.
I have similar problem. I am on 2021.11.5. I have added an automation that restarts Home Assitant daily, will see if that helps. I only have one Meross unit, will replace with another WiFi switch if it does not improve.
Same problem as ictworkshop. The instructions for setting up Meross LAN don’t provide enough guidance if when you start it up it doesn’t discover anything.
Same problem for me. The automations stop working to trigger Meross devices and so I have to restart HA core and they start to work again.
Did anyone find any answers as to why? I have HA restarting three times a day until I can get a fix. Heavily invested in Meross plug sockets so changing to another supplier not ideal.