I will try to explain my first question with an example:
Before optimization, all pictures are in their places.
After optimization, some pictures (for example, a logo) are replaced and become any other picture from the site (for example, from a blog post)
That is, there is a logo.png file that contains the logo.
There is a file blog-featured-image.png that contains a featured image for a blog post.
After optimization, the image in the logo.png file is not a logo, but a blog featured image. (I checked the file via ftp. If you open logo.png, the logo will not be there)
Regarding question number 2, I don’t know what to say, because other image optimizers work well and don’t have this problem, but I want to use LightSpeed.