I found this thread when looking for a fix for my Meross dimmer as well. Have you narrowed down what’s causing the integration to stop working? I haven’t had a chance to test my theory yet, but I’m wondering if it’s related to my internet access going down briefly (which happens at my house fairly regularly for anywhere from 5 seconds, to a few minutes at a time, unfortunately due to the type of internet service I have in my area).
I planned on setting up an automation that triggers an integration reload any time my internet access goes down (which I already monitor with ping sensors).