Imgur blocks access to most VPN IP addresses so any posts using the host will result in many users being unable to see the content. Sometimes only remote viewing is affected but is also often blocked when trying to open in new tab and view at the parent site.
Consider uploading to the fediverse or using a privacy-respecting hosting service like postimages.
I’m on Fedia and not using a VPN, I never see imgur thumbnails in the posts, I always have to manually click on a link. I rarely bother to click.