Problem with 5G Wifi (AC88)

I'm having a really weird issue . When I try to set any channel above 112 "channel bandwidth" drops from 80 MHz to 40MHz or 20MHz. When I look at the setting it's 80MHz but when I switch to "wireless log" it says 20 or 40MHz. Also when setting channel 112 it still shows 112 in the listbox under 5GHz settings, but when I try to set any channel above 112 it changes to auto in the listbox but shows correct channel under "wireless log",

I have tried different firmwares and reset to defaults but...

Problem with 5G Wifi (AC88)