I also noticed that some sites like this example https://cromwell-intl.com/travel/japan/wwii-cryptanalysis/?s=mb are quite picky about linking to their opengraph images.... .
This is how it is rendered on fedistats 😅
I guess the reason is that I'm not actually saving all those pictures but linking from my page, and I guess external links aren't liked well... .
Although for me this is still better than keeping a copy of those pictures. Not sure anymore, though...

