Well thats beaten me – i can’t see why Google would still be requesting images that are not present in the HTML.
I would suggest removing the filter and look at optimizing your images – they are quite large, for their purpose. Reducing their file size will actually improve real performance whereas as fixing that opportunity will not.
Thanks for the help in any way.
I just didn’t understand what you meant by “removing the filter” I don’t know how I could reduce the images even more. I have already converted all of them to webp with the “WebP Express” plugin, other attempts that I had to reduce the size the quality decreased noticeably.