I would like to advice to report the issue to Support | Homey.
Did you try a factory reset and re-reading a cloud backup?
(Using a local USB backup won’t help here, while it re-reads your system 1:1, including every issue).
Do you use the 5.2V power supply, or the earlier 5.0V model?
You’ll need the 5.2V model.
Homey should run fine without modding for xtra cooling, but it gets pretty hot.
As far as I know the max allowed CPU temp is 85°C and CPU will start throttling.
With a search here for “cpu temperature”, I found this:
