And did you bother to find the answer yourself? The answer is already in the first post. And if it switches only sometimes it’s an issue with Homey’s Zwave. Not for me to fix as well.
Known issues
Energy measuring for Shelly Wave 1PM/2PM not implemented. The library that Athom maintains for including Zwave devices has not been updated for a while and currently does not support Zwave command class METER V6. Therefor energy capabilities of the Shelly Wave 1PM/2PM have nog been implemented yet.
