I resolve my problem in connecting my homey pro with cable rj45.
@Marcel_Revet You are not using a officially released software version but a beta or release candidate. This could cause instability in the software.
Homey replaced the unit. No issues with the new one so far. Seems like a hardware failure
That was very quick. 
That is perspectiveā¦ if your entire home is being controlled from homeā¦ it takes pretty long to solve this
