Since two weeks I have issues between my router and 65OLED706/12 from Philips. It's android tv. So when I connect to wifi I always see first: Connection limited, do you want to continue?

Afte I click on Continue, I see that I have internet in the device but everything is loading very slow or even not at all (streaming channels and recordings).

There are some threads on the Internet suggesting that I should switch date and time of my TV to manual, but it wont help.

ALL other devices at my home work fine: hue, ps5, macbooks, iphones, hisense tv. Before everything was fine with this Philips too. I am not sure what happened.

What else can I do? I checked with 5GHz network, 2.4GHz network and same issue.