Hi,
An image and the file.
Well, maybe these distant spots are normal.

In addition I also do tests with SubD. I thought that once we had applied the subdivision we could not go back to the original state. But surprise, by separating then by re-applying SubD I found I found the original. You may say to me: But it's obvious my friend !!!

I hope not to waste your time. But I have lots of other questions that I cannot find an answer to in the help or on the forum (yet I am looking for), so I will wait a little, a lot, passionately ....