BUG: MouseListener::mouseExit doesn't get called if mouse moves quickly between components

Have you seen this thread? Tooltips sometimes drawing out in left field

We were seeing similar issues which have now been fixed on the latest develop branch. Specifically, as of this commit: https://github.com/WeAreROLI/JUCE/commit/7d98da98ea4ea811ca5b0bc4ca315b95d9bfc0d1