@JoshuaJam 

Try the solution @CallieLinux found on their own thread to see if it works for you: 

https://community.tp-link.com/us/home/forum/topic/183522

@Tony 

Yes I tried this solution last night after I posted this and it does seem to be working.

@JoshuaJam this solution worked all night last night but when I left my house and came back it could no longer obtain an IP address, when will a new firmware version be out to fix this problem (which I'm sure is more widespread that just aren't posting on the forums)?

@Tony 

I've actually removed the "solution" from my post. The workaround I found only applies if you don't leave the network. I still have to reboot my router everyday to keep my Wi-Fi 6 devices connected.

@JoshuaJam 

I am also having the same issues with the Archer3000. It seems that the 2.4G doesn't work in AX mode so what I did was to set it to WiFi 5 and not use the AX band. The 5G band works well in AX mixed mode but not the 2.4G. hopefully TP-Link can resolve these issues because it defeats the purpose of buying a WiFi 6 router and using it only in WiFi 5 mode.

@JoshuaJam 

It may not be the router but Android Pie 9?

Some reports of this if you Google it, and some ways that might 'fix' it?

https://www.bestusefultips.com/fix-wifi-problem-after-android-9-pie-update/

I was working fairly well under V 8 of Android (Icecream I think?) and when my LG went to Pie 9 many problems from failure to connect ot dropping out.

Right now, and an Archer A20 I have to use the 2.4Ghz band, the 5Ghz is really unreliable with Pie 9. Even using the 2.4Ghz band I'll get occasional failures to connect or drop off. I also see Seaching, 911 Only, and the phone still works as if it is on Wifi?

@IrvSp 

This also occurs on my wife's iPhone 11 Pro. We both are kicked off of the Wi-Fi 6 at the same time.

@IrvSp yeah I misrepresented it, it's definitely a WiFi 6 problem, which like the previous poster said, defeats the purpose of having a WiFi 6 router.

@JoshuaJam 

 I am sure it is, but I found it was working 'reasonably' well when I switched over to the 2.4Ghz connection on the phone. 5Ghz didn't work 1/2 as well.

It isn't the router in my case. I had a Netgear before and once the phone updated to Pie 9 it became unreliable to switch. I kept it on the 5Ghz SSID though. When I switched to the TP-Link I played around and discovered 2.4Ghz SSID was the best.