For those of you having issues with this Magisk module, you could try Intra by Jigsaw Operations LLC (an Alphabet company). It permits to securely connect to Google or Cloudfare dns.
Just search for it in the Play store.
Just for your info front cam doesn't FC on my 3T.
Tested both with Google camera and the camera included with the ROM.
I use latest version of Carbon with latest version of bluespark kernel.
I did it: flashed 4.0.1 followed by SuperSU, then format dalvik and cache -> reboot
All good, no issue to report so far.
Flash 4.0.1 full, not the OTA unless you need a brick.
Upgraded from rooted 4.0 to 4.01 no problem except theme: when 1st boot in 4.01 theme was the default one even if selected was the dark theme, then tried to change it, but whatever I select it never changes and stay stuck on default theme.
Anybody else having same issue?
Yes, that you can just flash the full 4.0.
I had the same setup + root and it all went well.
Now why wouldn't you upgrade TWRP first? You would better do it now as once in 4.0 you don't know what might happen if you do it.