@Kevin_Z OK for me the only solution to manage 1.5.1 firmware problem with 0 online clients was to downgrade to version 1.2.2 Now system is up and running smoothly - all 70+ clients are online and...

Exactly my case, we need new firmware urgently to fix

Interesting, mine x50 (6 decos) also connected as router to MObile Internet via ethernet, but only all clients are moved to off line clients list, but can access internet

@Kevin_Z Done. All devices with latest firmwares. TK240617568. Attached is reaction on trial to connect to 2.4 guest or iot from iphone or ipad. Sometimes i get "Wrong password" message instead of...

@David-TP Hi! This upgrade just ruined my deco x50 setup, so i was pushed to start from the scratch by resetting all my decos(6!) Now the system somehow is working but all my 70+ clients are showing...