This is an old topic, but it remains an issue in MyEclipse 9.
The only solution I’ve found is to change the setting “General->Editors->Text Editors->When mouse moved into hover” to “Close hover”. The hovers will still display, and I agree this is not the best solution, but they will disappear when the mouse is moved into the hover. If you want to see the information in the hover, and possibly interact with it, press ‘F2’ to make it sticky. Press ‘Esc’ to make it disappear after pressing ‘F2’.
It would be really nice to have a configurable delay on the hovers…