1. I don't think it's server-side as I was able to re-join
2. This only happened when I pondered the empty blaze burner (Possibly others that have entities)

Here's the crash report: https://pastebin.com/J7afBwiT

This issue has been marked as stale because it has been inactive for 3 weeks. It will be closed if it remains inactive for another 3 weeks.

This issue has been closed since it has been inactive for 3 weeks since it was marked as stale.