I noticed from about version 4.1., But there was no time to check
I have not changed the set size of the thumbnail since version 3.7
If in version 3.7 I tried to change the size of the thumbnail

Then when editing any user ad, changing the ad in the photo became the set size.

Recently, the thumbnail is not placed in the user's ad, since it was set in the thumbnail settings. Or is being placed correctly through an ad

Even if I edit a user's ad and change the photo, after saving it remains the same.

Media settings do not bring changes

It seems like some of your thumbnails has size 322x300 px instead of 400x300 px.
Have you tried to regenerate thumbnails as well to disable best crop?

Yes, I tried to regenerate about five days ago, for the first time ever, but at that time the miniatures were already of this size. Regeneration gave no change

@andrey
Ok, disable best crop?

Yes, with the disabled best crop it became as before. And when editing the ad, the photo becomes the desired size. Thank you

Could you attach sample image that caused issue? Best crop should still keep desired size.

With the "best crop" disabled, I edited the problem photos in the ads and they took the right size.



Now I have enabled "best crop" again.
Users will post ads during the day. I will write and throw off the photo of the result

Now the site is working in normal mode, without errors of photo size, with "best crop" enabled.
Probably not successfully updated the Osclass the first time. What else could be the problem?

I was wrong, overlooked at work from a mobile. With the "best crop" enabled, the same problems with the photo are again



Of today's five ads posted by one user, one with the wrong photo. I turn off "best crop" again.
This has not happened before. What else could be the problem?