For years I've been running a character analysis blogger series and I've been trying to share them in various spaces like Discord. However, I've noticed that after a few days of linking them in places, the thumbnail inexplicably stops working. This has been an ongoing issue for a while and I haven't found a place that can answer what I'm exactly doing incorrectly.
On the first image, you can see they've all been uploaded to another website. All but the top image aren't loading for me (may change once the site is up to date with the newest ones uploaded). When I advertise them in Discord the preview remains for weeks at a time before failing to load. The only place I've seen the thumbnails still work in are Reddit and internet forums.
I originally thought it had to do with how I copy my images from Imgur to post there, but after replacing various thumbnails with images directly inserted from my computer that still didn't fix it.
If anyone can give me advice on how I can fix this problem, please let me know!