It doesn't "teleport" you, it just changes your look vector, still a bug though...
That's because Minecraft has problems to save chunks if there are old villager with broken/unknown trades in the chunk...
That's not a bug, that's a feature... You can turn it of in the video settings, the "alternate Blocks"-option does that.
It's not only the Double Tall Grass, it's every 2 blocks tall plant...
Ignore that, i thought the front of my arms are my hand back. I just realized that the outside of my arms/hands are my Hand backs...
I just realized there was never one, i tested back into the alpha builds, and there was never a place sound... Should be added then 🙂 I'm used to it because i'm using a custom server software and there is one^^