What settings on AdGuard Home (Internet wide Adblock on the router that changes and manages DNS) cause steam to disconnect?

[Anick]

I installed Adguard home on my router for security, adblock, and better performance. I have noticed that Steam have difficulty connecting to the internet but all other software has no issues.
AdGuard is running DNS 9.9.9.9 as of right now. Would changing it to 1.1.1.1 from cloudflare help with that?