

Thanks!
I can confirm that the problem is instance specific. I was able to share both images on this account, but I had issues sharing the second image with a lemmy.ml account.
The first image has the URL https://lemmy.world/pictrs/image/b934b4ac-8e4b-4bde-a619-a70b819233ad.webp
, while the second (error) had the URL https://lemmy.ml/api/v3/image_proxy?url=https%3A%2F%2Flemmy.world%2Fpictrs%2Fimage%2Fcc5ef910-356c-4250-9be8-ec50b5a910a4.webp
I think this would be a bug for the Boost developer to solve, and hopefully your two examples will be helpful for that :)
No problem! :)