Nginx PageSpeed ​​Image_rewrite returns changed image title, how does this affect SEO?

Question

Nginx

Nginx PageSpeed ​​Image_rewrite returns the changed image name, but it inserts a Header Link with the real name and location of this file on the server
Here is an example:

https://site.ru/uploads/banner_code/3/x2.png.pagespeed.ic.eVd8440NtA.webp

agespeed.ic.eVd8440NtA.webp which was added to the filename BUT
in Headers there is this code

Accept-Ranges: bytes
Cache-Control: max-age=31536000
Connection: keep-alive
Content-Length: 10694
Content-Type: image/webp
Date: Tue, 21 Aug 2018 08:15:07 GMT
ETag: W/"0"
Expires: Wed, 21 Aug 2019 08:15:07 GMT
Last-Modified: Tue, 21 Aug 2018 08:15:07 GMT
Link: <https://site.ru/uploads/banner_code/3/2.png>; rel="canonical"
Server: nginx/1.11.13
Strict-Transport-Security: max-age=31536000
X-Page-Speed: 1.11.33.3-0

Where Link: <******/uploads/banner_code/3/2.png>; rel="canonical" leads to the correct URL

Answer 1

canonical links tell search robots where to look for the original content (what needs to be indexed) with DUPLICATE content. That is, if a copy of the original image from rel canonical comes from nginx to the original, then search engines will not pay attention to the copy, knowing where the original is.