Player position desyncs/jitters when sneaking on the edge of ice blocks

When you sneak at the edge of ice blocks your position seems to desync. It's as if the client thinks you stopped earlier than you actually did before the internal server corrects itself. bug1.mp4
Reproduction Steps

• Sneak on an ice block till you reach the block edge

Observed Results

• Your movement is jittery
  bug2.mp4

Expected Results

• Your movement wouldn't be jittery