To recreate this bug, go into any world, fly up super high, and place candles on the side of a block so the candles have a long way down to fall. Exit the world while the candle is falling in midair. Then re-enter the world and the game will hang forever. EDIT: It's not falling candles but simply dropped candles that triggers this bug. Drop a few candles on the ground, exit, and re-enter for the world to hang forever.

The hand seems to be caused by this line of code.
https://github.com/bageldotjpg/Buzzier-Bees/blob/e15a70118eec7f2ab062f5304a7d385dae98e0c2/src/main/java/com/bagel/buzzierbees/core/registry/BBEvents.java#L69-L73

Specifically, it hang at getEntitiesWithinAABB for some reason as if the chunk isn't ready yet and will never be ready. Really weird.

Here's what the thread that gets stuck looks like:

Hopefully this won't be too bad to fix!

"Fixed" in #45 by not making candles fall. Might revisit eventually.