I have a oneplus3 and i am current on a CAF ROM (CODE AURORA FORUM) on this is no problems but the other Roms cyanogenmod base have problems :/ hope there is a way that you can fix it 🙂
Not my get just disconnect and reconnect in couple of seconds again and the same agin and again
Rescan
Wifi dissconect
Waiting few seconds
Wifi connect
And again rescan ….
Hope you can fix it 🙂