@Cawsie1962 I've downgraded previous versions. Just go to https://www.tp-link.com/us/support/download/archer-ax6000/#Firmware (assuming you are in US), download the desired firmware, and unzip the...

@Transmission1 If you have an RE355 Wi-Fi Range Extender, try unplugging that to see if the issue goes away. I have various models of TP-Link Extenders and have found that one to be problematic even...

@Gank I haven't had any issues with AX6000 on this firmware version. Looking at your settings, the only thing I have different on my 5GHz setting is Airtime Fairness is turned off. -Randy