I've been evaluating IntelliJ IDEA for couple of months now and most of my experiences have been very positive.
However, I bumped to very annoying problem which I cannot figure out the root cause for. The use case of itself is very simple: press a shortcut key => display java compilation errors.
I mapped a shortcut key (F4) to open the problems tool window, which first worked as one would expect until recently it stopped cooperating for unknown reason. To show any compilation errors I actually have to rebuild everything from scratch which is very, very annoying.
If I open the keymap settings and try to find what action my F4 key is bound to (filter settings), it actually finds nothing. If I try to bind F4 to another action, the following conflict is displayed:
"Assigned to [ActivateProblemsToolWindow] which is now not loaded but may be loaded after"
Any ideas what is causing this issue? IDEA version is 14.1.5, run on OS X 10.11