Images are generated in a different directory

Uploaded images are stored in a separate subdomain using WP-Stateless.
When a webp is created, the original image is created anew at the top of the directory.
Also, frequently there are images of a size that the webp is not generated for.

How can I make sure that the images are created in the correct directory?
Also, how can I get rid of the missing webp images?

HP:
https://example.com/
Images:
https://sub.example.com/storage/aaaa.png
https://sub.example.com/storage/aaaa-160×160.png
https://sub.example.com/storage/aaaa-225×210.png

After webp generation

Images:
https://sub.example.com/storage/aaaa.png
https://sub.example.com/storage/aaaa.png.wbep
https://sub.example.com/storage/aaaa-160×160.png
https://sub.example.com/storage/aaaa-225×210.png
https://sub.example.com/storage/aaaa-225×210.png.wbep
https://sub.example.com/aaaa.png
https://sub.example.com/aaaa-160×160.png
https://sub.example.com/aaaa-225×210.png