@Osau What's your Deco M4 hardware version?

@RB777 The latest firmware on website is 1.2.11 which was released in 2024.

@Redcrashbang What's your Deco model? Have u tried AP Mode from Router Mode? Have u tried to change wireless security to WPA2 only? Maybe your printer is not supported WPA3/WPA2 mixed.

@David-TP But why after turned ON QoS everything is fine and working? Can i uprgrade to Deco X10 will my issue resolve on Deco X10 ?

@David-TP Can you tell me why Deco M4 does'nt show bandwidth consumption of ethernet connected devices like Set-Top Box and also Ethernet Backhaul Deco Unit which are connected to Main Deco directly....

@Musllam Have u downgraded the Deco M4 firmware?