Tried that, but it didn’t work. What DID work was removing the power node and adding it again. Quite a lot of work for something that used to work 
This is the only thing still open now. I’ve sent an E-mail to Athom requesting this feature (I think it is useful in other places than just this use case) and got the reply that they take it in consideration but cannot guarantee it will be done.
Then I noticed there is at least one topic on this: [Feature request] Excluding zones and devices from Homey Energy - Ideas & Suggestions - Homey Community Forum
And people are getting the same response on this for months/years.
