Suspicious movement while descending?

When you start descending blocks sometimes the player will do a weird suspicious looking spinning movement. Is there any way I can prevent this from happening?

No file, test, or entry point is identified. Start by reproducing the suspicious spinning movement while descending blocks, then trace the descending movement path and existing movement tests. Done means the reproducible spinning behavior is prevented without breaking normal descent.

Written by the indexing model from the issue text.