Hi @David-TP and everyone else, on my case I found information about another user suffering from the same. He found out that 1.5.5 enabled QoS and set the max bandwith (upload and download) to 0.1...

Same here! TpLink, please send a fix soon. You should consider allowing downgrading firmware at least :(

Today my Deco X50 v1 upgraded automatically to firmware 1.5.5 and everything stopped working. Ping goes smooth to any host but no connections are stablished. Can't open any page. Rebooting the deco...

@SlavkoZ The happens here... It's the most annoying thing. Since I switched from Deco X20 to X50 I can't stop push notifications. I turned them off from the connection alerts section and from the app...