Hi there, We have WHD 12.3 also and use IE 11 to open the APP. I don't have any suggestions per se but I can confirm that those two versions do work without any issue. I would start to look at some third party application that is causing interference between the two. Have there been any changes in the IE settings? Have you tried to open it from a fresh install of windows? It could also be something within group policy. Please provide a screenshot of what happens when you try to open it.
We are on 12.4 and have no issues with IE 10 or 11.
here are a couple of links that have some valid resolutuons
also have any changes been made to group policy i know that sites can be added to compatabity view via the GPO if it was removed this could be the reason