some sizes are deleted for some images

Replies: 0

I’m running the regeneration processes now and it seems like some thumbnails are deleted randomly.
For example I use large thumbnails in my post content, most of them are shown, but some others are missing since the regeneration: https://snipboard.io/ImNJl9.jpg and https://snipboard.io/WVvxuE.jpg
In addition, while the process is running sometimes the thumbnails shown in the process window itself are missing: https://snipboard.io/bg9P5m.jpg.

the original images are still in the media library.
also, missing images are from different thumbnail sizes, both theme and WP sizes. some of them I set to “Keep existing”, but others I didn’t.

Delete Unused Thumbnails and Delete Leftover Image Metadata are both checked.

Thanks,
Itamar