I'm a big fan of keeping documentation in the code, so it appears at the point of use. Obviously, DocC and the Quick Help panel are a pretty important part of that strategy.
Unfortunately, it only works randomly, so even if I've just build documentation (which should not even matter, the doc is just a cmd+click away), Quick Help stays blank, often even on system items like Label.
It seems totally accidental, which makes it hard to make to reproduce. Sometimes an Xcode restart helps, sometimes not. Sometimes changing the editor display helps, sometimes not.
Any tips on that?