Thanks for the suggestions, I’ve tried healing and testing the network and for five minutes I kept opening and closing the window, but the two window sensors never use the wall plug as a relay. I have two failing sensors and 5 reliable sensors. The reliable sensors are all closer to the hub.
I’ll try removing and readding the failing sensors, if that does not work I think I have to buy some Fibaro sensors as other people also have struggled with the Neo Coolcam sensors Is the z wave signal really that bad?
I’m just surprised not more people have Zwave issues, I can’t be the only one with sensors close to the network edge.