@Billmanakos 
AFIK Downgrade from Beta is possible only by following Firmware Recovery procedure:
https://www.tp-link.com/en/support/faq/2958/

  @JouJek Hi, I had followed the procedure but I've missed the specific firmware ( that old one ). Managed to revert back to 1.2 , reset the deco , setup again as new then 1.7.1 and now 1.8.0 . Have my main with the latest not beta , and other three satewith that 1.10.0 beta. 

Thanks @Billmanakos for your feedback
I rather wait a bit longer than. I am running 1.8.0 for quite some time but it also causes me some troubles - I have a X50 v1 network consisting of 7 decos now in router mode with around 70 devices, mostly IoT. The network view is messing up over time but also the system gets slow in responding after some time with lot of timeouts in the Deco app. I have enabled nearly all features including Home Shield - and some component is eating up memory over time, so it will auto-recycle every 5-7 days due to running out of memory on the main deco. Overall the system is stable from a network traffic perspective but hard to manage if you are not rebooting it regularly. Daily reboots are also not really working as some devices (like my TV and some IoT) have troubles properly reconnecting and then those need a power cycle. The older firmwares for X50 were more stable and I would hope that with 1.10 we get those issues ironed out

Best,
Hannes

  @SpaceWalker73 Hi, for me that problems went even worse with this update. I am now with 1.7.1 and everything is working as it should be ( with already known problems but no lag ). My X50 router is 1.7.1 and all the other X50 with 1.10 so I think that the firmware is not optimized for massive use of the hardware or the hardware is not capable doing so much work.

  @David-TP 

deco x50-4g is eligible this beta ?

  @gnz 

hi 

I sacked my x50-5g off as well as it was terribly unreliable , and replaced it with a BE65-pro , that after a month I'm now having problems with after the latest firmware update , I've a x50-outdoor that when it was connected with my x50-5g and multiple x50-poe's removed all eco settings etc from my system .I  seem to spend more time on this  system trying to just make it function correctly, life's too short !  I've just spent hours today trying to sort out the latest issue , I'm an electrical / electronics engineers with decades ( 40+ years ) of network experience , god knows how a layman / general public goes on with them. One thing I have learned the hard way is DONT UNDER ANY CIRCUMSTANCES DROP BETA FIRMWARE ON TO YOUR SYSTEM !.