I set my wifi to th 5ghz range as that is the only way to get blu ray rips to stream across my network (can't do wired).
I use the method described in this thread Force Raspberry Pi 4B 5 GHz WiFi to set to 5ghz.
However recently (after the pi locked while watching a blu ray rip) it now reverts to 0 on the frequency line in the settings file after a reboot.
How can I make the setting stick?