I'm runing new 41E5 on AC66u, just few hours of testing.
Cloudflare stubby issue seems stabilized and https://www.snbforums.com/threads/fork-asuswrt-merlin-374-43-lts-releases-v39e3.18914/page-491#post-527447 trick is no longer necessary.
I see some ssl certificate issues
I can not access to...