oweban
(oweban)
9
Try opening the thread in an incognito window - it sounds like as it’s accessing the image, it’s doing background authentication. You can see it because you’re authenticated, but nobody else can.
Realistically, imgur (and other options) is probably the quickest option. Chrome has a “re-host on imgur” extension, so you can right-click any image you see in Chrome and it’ll re-upload it, then you can just copy/paste the imgur link.