@arturo99 , I have done the following as a test:
- your 2.4GHz WIFI was renamed (at the end 2.4GHz)
- for the 2.4GHz WIFI I have fixed the channel to 1
Please do the following now:
- connect your devices which are further away from the modem with the 2.4GHz WIFI, the others with the 5GHz WIFI. Test it again
- as a further test, turn off your 5GHz WIFI and test everything with the 5GHz. Try the reverse after that.
Greetings
Daniele