RAX50 AX5400 Better performance so far with AX disabled.

I have a few week old RAX50 I just bought.  Im running into an issue where Wifi 6 connection gets small pauses, wont load images right away, then after a few seconds 5 or less the images load.  I have an old Belkin Wifi extender if I connect to that (not Wifi 6) no issues so far.  So im going to try to disable the AX in the router and let that run for a few days to see if that helps.  

Wifi 6 devices are:

Note 10 Plus

Iphone 11

Firmware on the RAX50 

V1.0.3.96_2.0.59

I didnt not factory after the firmware update.  Not sure if that was needed.  I just upgraded and set it up.  Also with AX on reboot the router once a week seem to help for a bit.

Thank you in advance.