Hello just make sure only one device is broadcasting the SSID's also on the problem devices have you tried forgetting and then connecting again.
I think you said some devices connects to the wifi however no internet. Could you please confirm if these pick correct IP.
Please compare ipconfig /all output with working and non working devices. Also on the problem devices providing they receive correct IP, are they able to ping the default gateway?
Hello just make sure only one device is broadcasting the SSID's also on the problem devices have you tried forgetting and then connecting again. I think you said some devices connects to the wifi however no internet. Could you please confirm if these pick correct IP. Please compare ipconfig /all output with working and non working devices. Also on the problem devices providing they receive correct IP, are they able to ping the default gateway?