Hi, I'm in desperate need of help. 

My P9 decos are going crazy, they work properly showing a 450MB download speed and then they randomly lose connections like if they are rebooting themselves showing the red led and the app no longer show them. I believe that the latest update might have been causing this. If I use a different router the connection never drops, I've tried to reset them, I've tried to set a different one as primary but things don't change. Two of them are actually connected via ethernet cable too. 

Can I try the beta firmware I see here on the first line https://community.tp-link.com/en/home/forum/topic/697580 or is it only for V2?