I have checked your repository, and I cannot even see your images. I find that your uploaded images don't have height * width dimensions, causing an issue. Could you upload your images again in this format?
As I mentioned earlier that you can still upload new images. My team also concluded that the issue is you want to keep your Media Library clean, though the issue is annoying for you.
This is not a priority issue, and there is no guarantee of when this can be resolved for the moment. My team will keep track of this ticket and review it during the Editor revamp.