UPDATE: As of 9:44 AM on January 31, 2020, all of the issues described here appear to have been resolved for me.
I just opened up my itch.io dashboard today and found that all of my games had their icons as broken image links. I would post a screenshot directly here, but it seems any image I upload also appears as a dead link so I'll provide an imgur link instead https://imgur.com/Vkie0kP.
This affects all 12 games I have put on itch. I haven't checked the site frequently since the end of summer 2019 so I don't know how exactly long the images have been broken, but I'm positive they used to all work.
Upon further investigation, it seems the problem is bigger than that. Viewing the games from my main profile page it appears that their covers images were, fortunately, unaffected: https://jusiv.itch.io/. However, I've found a number of images (both .gif and .png ones) across my game pages have been similarly broken. In one case, here https://jusiv.itch.io/aurora-railway, only certain images have the issue.
The full list of my pages that have been affected is as follows:
And yes, I did confirm with someone on a different network that the images are broken.
I can re-upload them all if absolutely necessary, but I'd love to know there's a faster fix or a way this issue could be addressed and prevented in the future!