I recently got a Deco BE85 as my one and only router. It's been working fine for 2+ weeks but now all of a sudden my Robot Vacuum (Roborock Q Revo) stopped being able to connect to wifi.

I see that it's incompatible with 5GHz wifi so I've been trying to set it up for 2.4GHz but I'm getting tons of problems.

I've tried:

- Connecting using the normal network (5GHz + 2.4GHz) -- doesn't work, robot cannot connect at all

- Changing the normal network to only 2.4GHz -- doesn't work, my iphone / mac / oneplus cannot find connect to the network anymore

- Setting up an IoT network only allowing 2.4GHz -- iPhone/oneplus/mac cannot find the wifi so I can't even connect the robot to it

- Setting up a guest network only allowing 2.4GHz -- iPhone/oneplus/mac cannot find the wifi so I can't even connect the robot to it

In addition I've tried:

- factory reseting the deco

- factory reseting the robot vacuum

- reseting the network on my phones & laptop

- rebooted everything

- changed wifi name and password

and nothing works. None of my devices can see any of the 2.4GHz networks, but I can see my neighbours 2.4GHz networks just fine. I'm going crazy having spent so much on an expensive router that isn't compatible with anything whereas the cheap router given by the internet provider works fine...

Is there anything I can do to fix this?