OK, to which port of the AX6000 the ethernet cable from the modem goes ? Describe your normal topology.

Maybe the device has been provided to you by the ISP and it has a customized FW.

@VfV Are these TL-WPA4220 support OneMesh already ? On the official supported list they are with status 'Planned'. In this thread's solution you can find a beta FW which was released to improve...

Look at the Tip1 on the screenshot, it would explain this behavior.

@panoptic Not much settings here....When you enable LAG and click on Apply/Save button (on the modem) is there any additional options aappear ? Can you make a screenshot from your AX6000 on these...

@AmeenY Are you with these settings for wireless security and encryptiion for both bands ? If not, try to set them as in the screenshot and try again. If yes, hard reset (Method 1) the router and...