Here’s small issue that happens to me.
When I’m in blueprint edit window, and I have my context menu appearing (the right click menu), if I hit a keyboard shortcut like copy, or paste, the program would freeze for around a minute or two.
This often happened to me when I wanted to cut something, or paste in the blueprints, and I would accidentally hit the RMB.
Thought it’s something worth reporting.
Using Unreal 4.7.2, yet similar things would appear in earlier versions. Also windows 7 64. Can provide more info if needed.