Beam surround connect to one SL

Hi

I have a beam gen2 and 2 one sl set up as surround,  They have been working fine for almost 6 months.

One day the beam was gone from the app, so i tried adding it again.

And now it shows up but when i try to add the 2 one SL as surround speakers it take some times and always fails, and says there is something wrong with my network, and when that happens the beam and sometimes the 2 one SL do disappears from the app.

I have tried resetting the system and my router many times and I'm considering electrical waste soon :-O

Everything else works fine in my other rooms