Same problem here with Sunny Home Manger 2.0 after update to 1.4.0. My five Shelly Plus Plug S randomly disconnecting. Sometimes they reconnect after a while sometimes not. I don't use them for switching with the Sunny Home Manager but to measure power. In the Sunny Portal i have the the gaps in the measurement. As i read here there looks to be no way to downgrade to 1.3.3 anymore? I hope an fix is coming very soon. How such update could be released with this kind of problems. Looks to be this is also affecting some other use cases.