'Slow resolver detected' logspam and inability to look at systemd logs

[TheCraiggers]

I've got a small server hosting a matrix stack, and when I look at the sysapi container logs it's just spamming this "slow resolver detected" message over and over ever few seconds:

Also, and I don't know if this is related or a different issue, but that same server is seemingly unable to look at any logs from the systemd journal. This is extra irritating because all the docker logs are turned off and sent to journal instead. Searching hasn't turned anything up yet, so I thought I'd ask here to see if you have ideas.