Jellyfin getting hourly 502 on Uptime-Kuma after adding music library?

I'm running Jellyfin in Docker in my home server for movies and shows. I recently added a music directory and apparently after that I'm getting almost hourly notifications from my Uptime-Kuma instance connected to Gotify that Jellyfin is down with status code 502. It's quickly up again, but I'm wondering what's causing this....