It’s not normal, but it happens to a lot of people, so it is a known problem. I don’t think anyone has ever come up with a definitive answer on why this is happening (mostly because Homey is basically a black box, so you don’t get to see what happens inside).
Homey has just proven itself to be very sensitive to network/WiFi circumstances changing and/or interference. Whereas most devices (even €2 ESP8266’s) have no problems with that, Homey in particular seems to get “lost” very quickly. Sometimes it resolves itself, sometimes you need to reboot Homey to get it to work properly again.
This problem is (or should be) known to Athom because it has existed since firmware v2, which was released about 18 months ago. Either they can’t fix it, or they don’t give it much of a priority. This is one of the reasons why a lot of people reboot their Homey on a daily basis.
You can do that from here: https://support.athom.com/hc/en-us/articles/360015784034-Submit-a-support-request
