@shaywood I was unable to downgrade via GUI like most. I dod just restore my config after a factory reset of the router. Lost all my 2.4G again today and seeing if that does anything. I will try and update should it drop the 2.4 band again or other issue. I will also post should I figure out how to go back to the old firmware. All honesty I bought at Costco and if TP Link cant fix this I may return it. This should be something they are taking seriously and fix ASAP. Love the router but I expect my internet to stay stable especially when using tons of smart-home tech.

@Mystiky .. looking forward to see if that works and its just a matter of re-entering things manually. Please keep us all posted.

Well it worked great for a few days but I've lost all my 2.4 devices again 3 times in 2 days now. That's with smart connect on and firmware version 1.1.1. So looks like turning on smart connect is not the answer.

@chaples55 , yea I had where all the sudden I could not reach things from PC bit could ping from diagnostics on router. I have now set in the reboot section scheduled weekly reboot. That is really nice and worst case will eliminate the problem until its resolved in future code. We need TP link. To fix those though. I never had the problem in the beta code and wish I was still on it, but this code for its enhancements is also great outside the total 2.4 Loss.

Right now I'm set to once a week in the AM and will see if that stays stable sence the last factory reset. The backup, factory reset and restore definitly made it take longer before issues. I never did drop my 2.4 completely, just things stopped being reachable on and off and had to reboot which fixed it.

A temp work around for anyone with this issue and annoyance. You can at least schedule reboots as often as needed or never hopefully see the issue.

STILL NEED TO TRY: I still need to factory reset and manually put back in all info. Just not up for it right now as it will be very time consuming.

@Jerryb Still no problems here,  Been running the latest FIRMWARE since 9/21/2020 with no Router resets. 

@Mystiky 

Same here.  Beta firmware fixed the issue and production firmware seems to be fine as well.  Been using it since it was releasrd.

FWIW, I had the 2.4 problems with the previous firmware, and had to resort to a nightly reboot to keep them at bay.  I never tried the Beta, but the latest firmware has been without issue.  I have Smart Connect off, the 2.4 channel configured to prevent overlap with a long distance 2.4 link I have (neither of those helped with the previous firmware version), and a weekly reboot configured.

@Mystiky ... Did you do a factory reset and manually redo all your settings?

Mine keeps loosing functionality. Went with a restore since I have over 50 devices and special settings. Even at times looks like everything is connected but stuff doesn't work unless a reboot. Very frustrating, but hopeful maybe that is the resolution. As for now though scheduling nightly reboots.

@samadril 

I too had the problem after upgrading from the beta to the latest. 
 

I have just done the hard reset off the router and done the initial setup. I have so far not had problems with the 2.4ghz dropping out on the devices as previous for over a couple of hours now. Used to get device dropout after 10 - 15 minutes.
 

I too have not put the smart connect setting on either.

I had been chatting to Tplink support before trying this and they have a senior engineer due to email me back. 
 

I will let you know if it lasts longer than a week.

@Jerryb 

On the beta code never had issue. I have ticket open with support to go back to beta. They are going to help me, hopefully not to hard to do so. I hope they actually fix the issue. I'll lwt you know. Very frustrated was gone 2 days and turn out 2.4 went out while I was gone and then 5G too. I checked on way home and had 0 of 50+ devices connected. Thankfully I was able to reboot remotely. They need to fix this!!!!!

Jerryb wrote

@shaywood. funny you say that, I have a similar amout of 2.4 devices,  wonder if thats too many for it to handle.