@Jayjay28 Hi, after some research with supportteam, I had to replace this switch via RMA. There was no other solution. Since replacement, everything works like a charm.

@Hank21 unfortunately this "downgrade" isnt the solution. After restarting Router with 2.1.3 or 2.2.0 it goes to "configurating" state for about 12 Minutes, after that router goes in "disconnected"...

@Tripod64 Some people do have privat life and a work. Just be thankful getting some answers on weekends and learn to be patient, at the end patience will win. you can install all the firmwares, but...

@Tripod64 Hey M8 just to clarify - I am not satisfied with the way it is going about QM, ending in fails like broken updates, firmwares etc. But am actually their partner and standing really close to...

@Tripod64 yes, thats exactly the way it is. But honestly, do You think, someone will read or react on this? Since over 1 year its the same banana qm battle on customers, but well - there is no price...

@Clive_A I didnt get any mail...sorry