MacOS config profile not working correctly

Hi,

1. installed the config profile on Big Sur and all working as expected.  

2.  Installed Adguard app and nextDNS stopped working.

3. Uninstalled Adguard and Root CA, removed network locations and started fresh

4. Redeployed config profile (and got running after disabling little snitch) but not working correctly, only filtering some dns requests...?

5. Installed nextDNS App from app store and immediately dns logs with config profile identifier show...

I would like to have nextDNS working again without requiring the App - is it fully supported on Big Sur?