Experiencing lots of block update lag with blocks that have been mined, but then those blocks reappear as if they were not mined and I have to mine them again.  This has now caused my character to get trapped inside a mined block and I can't move... at all.

Seed: 870200269159646299
XYZ: 397.939  23.00  177.280
Facing North

In an abandoned mine, I mined the oak planks and fence blocks, then mined a stone block that was adjacent to the oak planks above.  Gravel fell down, I stepped backwards, then, either the oak planks or the oak fences reappeared behind me as the gravel that fell pushed be into them.

What I expected to happen was...:
I expected to step backwards away from the falling gravel.

What actually happened was...:
I got stuck, presumably in, either the oak fence or planks that reappeared behind my character, and I cannot move my character in any way.  I can't look around, can't crouch, can't jump, walk or run.  When I move the mouse, the direction I'm looking in changes a little, but flips back to the direction I was looking in at the time my character got trapped, in less than half a second, so it's all jittery when moving the mouse.

Steps to Reproduce:

Would be difficult to reproduce because you'd have to mine an oak fence/planks against a wall, then step through that location and cause grave to drop that'll push you back just as the oak fence reappears.  Good luck with that lol.