I wanted to move away from Tailscale but found Headscale a bit too convoluted for what I actually needed.
Ended up with a simple WireGuard setup using two VPSes: one as a VPN hub, the other acting as a reverse proxy back into my home lab.
It lets me expose services publicly without any inbound port forwarding on my home connection.
Thank you for the heads up, turns out it was the custom html code in the code blocks causing the issue. Fixed now.