Internet Explorer Bug

I am almost finished with a custom wordpress child theme, but an internet explorer bug is slowing me down. Everything works across all other browsers, and I fixed all the original IE bugs except this one. The problem occurs when I roll over the right side of the screen on either the largest thumbnail or the one in the bottom right. Half of the large thumbnail disappears and the bottom thumbnail flickers, instead of acting like the other thumbnails (which fade into a preview of the metadata).

My homepage is coded in html rather than php so that I can have more options with thumbnail sizes, and this is the only error I can see. Any help would be greatly appreciated.

https://www.seanahayes.com/digrouparchitecture

Thanks in advance!