Cloth jumping on first frame

[josemendez]

Because I don't know how to insert the picture, I still put it in the attachment.

I also found a problem. When the first frame is hidden, in fact, the cloth calculation of the first frame is still in progress, so the bad phenomenon caused by the sudden change of the first frame still exists. Thank you

Whats the "bad phenomenon" you're talking about? I still don't know what's the issue.

From the pics you sent (which is actually the same picture twice, as far as I can see), all I see is your cloth settings. At least I need to know: where's the solver in the hierarchy, what you're trying to do, the result you expect and the result you're getting.