During me and my little brothers world, we decided to upgrade to snapshots and we did so and loving the new updates. However, when 17w18a hit, we couldn't play on any difficulty besides Peaceful due to a bug that we have been having. When we change from peaceful to any other difficulty, our hunger goes up even though it won't regenerate our health. The hunger will go up and will go back down when running or being hit. This is a huge issue because it doesn't allow us to eat food to regenerate our health, nor does it allow us to play properly on any difficulty because of this bug. This is a huge issue. I would attach a crash report but F3+C doesn't seem to work on Linux. My computer is hosting and playing the game at the same time. We only have 2 players playing the server at once.

Here is a video of the bug in effect. We are not using a modded client nor are we using anything other than vanilla:
https://youtu.be/_6xaSJ7Gedo

Crash Report from my system:
https://pastebin.com/zzUNbUF1