So, the domain in question is ms.markosaric.com. Which is a CNAME to custom.plausible.io. uBlock Origin is able to block based on CNAMEs, but it is not a default configuration. PiHole V5 blocks based on CNAME as well, and it is actually enabled by default.

I run a little blocklist project [1] and I've had custom.plausible.io blocked in my list since April 8th [2]. So, although I didn't have ms.markosaric.com blocked directly in my list, the PiHole still would have blocked it via CNAME blocking. Also uBlock origin if you have CNAME blocking enabled.

[1] https://www.github.developerdan.com/hosts/

[2] https://github.com/lightswitch05/hosts/commit/21fd108ffd2996...