I did have several issues with adguard home, after some time (or packets?) the dns wouldn’t resolve and basically you can’t open any website, you can ping with no issues but not opening the site, only resolved by either restarting the server or waiting few minutes, didn’t bother to troubleshoot it but I tried it on several hardware and got the same issues with different interruptions time.
I experience similar issues with Cloudflare Zero Trust (I have it setup to work as an ad blocker, using a Terraform config to update blocklists pulled from eg uBlock Origin sources). It'll work great most of the time, but when it stops working I need to disconnect and reconnect. Hard to complain since it's free, though.
