Put the summary of the bug you're having here
What I expected to happen was...:
to walk through an area
What actually happened was...:
I get stuck, then I click randomly, then the Netherrack breaking particles appear, and a piece of netherrack drops.
Steps to Reproduce:
1. Dig a lot of in the Nether
2. Randomly get stuck
3. mine the block you got stuck on.
Does MC-172550 describe your issue?