the song will abruptly stop playing at about the 1 quarter mark (only skipping the song or restarting will fix)
You aren’t the only one to report halted playback in Navidrome. It appears to be a known open issue that goes back a few years.
One user in particular suggested last fall that the source of the bug may not be Navidrome’s fault. Are you using a reverse proxy?
For those that are still struggling with this issue, I can confirm that (in my case) the problem was related to the HTTP/3 QUIC protocol (not a Navidrome issue). As suggested by a few others in this thread, the issue can be addressed by ensuring that your reverse proxy supports and is configured for HTTP/3 QUIC, or by turning off the QUIC protocol on the client side (browser configuration), or by disabling HTTP/3 (with QUIC) feature on Cloudflare.
I don’t think Tailscale counts as a reverse proxy, but it does support HTTP/3 and QUIC so that suggestion may not apply here. Still, it might be worth double-checking to see if they are disabled. Also, have you tried disabling Tailscale altogether and connecting directly?