I tried to search for this issue before posting git and I did not find anything.
The issue is that after I did a research in the hero academy, it glitches out and it doesn’t allow me to level the building anymore, not do any other research.
I have attached some screenshots as proof. You’ll see in the screenshot that it shows a collect sign the whole time. But that collect sign doesn’t want to disappear even collect newly trained hereos. It is pretty irritating because I was on a leveling spree with the academy.