I have first noticed this issue when testing NLOS for my OnePlus 3.
After starting the WiFi on my phone, 2.4 GHz WiFi appear and connect in about 2-3 seconds, while 5GHz WiFi networks take 20-30 seconds until they appear.
The XDA user nvertigo67 discovered that the solution/workaround is to delete or comment out the line which contains
gInitialScanNoDFSChnl=1
from the file
/system/vendor/etc/wifi/WCNSS_qcom_cfg.ini
Here’s his solution: [ROM][SDCLANG-6][microg ready][OMS exPosures]NLOS-16.0] - 20220430 | Page 53 | XDA Forums.
Here’s how the commented line looks in Solid Explorer:
All i did was add a
# in front of it.
I have found the same issue in Havoc-OS, and i reported it here: [ROM]-[23.07.20]-Havoc-OS-3.7-[10.0.0_r40]-[Official] | Page 464 | XDA Forums