It'd be hard to show this bug visually, so I'll just type it. I have a large tree farm that consists of a system of hopper minecarts below to collect any leftover drops. I always need to check the minecarts before I use my treefarm, just incase they are frozen or gone. Most of the time they are frozen, but sometimes they just disappear. Its probably due to unloading chunks as I do use my elytra a lot. Its really annoying and it would be great if this bug was fixed. Thank you.