Clothing simulations work differently at different levels.

Hello.
Clothing simulations work differently at different levels in the same project.

It works normally at level A (video)

At level B (video), it shakes unsteadily as if it’s interfering with something.

All of the Physics have been removed.
Level A and Level B are in the same project.
It looks like it’s working normally when you’re still.
But when it starts to move, it flies abnormally.
Can you give me some advice on the cause of this?