There was an issue where the W20-UBEA from Sengled dropped connections:
https://github.com/home-assistant/core/issues/117275
There is now a newer firmware available:
https://www.matteralpha.com/sengled/sengled-smart-plug-p116
Can anybody confirm whether the issue still persists?
GitHub
The problem After a random (short-termed) amount of time all but one random plug disappear with the error This entity is no longer being provided by the matter integration. What version of Home Ass...