1. Add calendar block to Moodle
2. Add some assignments to a course with some due dates
3. See the highlighted dates appear in the calendar block
4. Hover the mouse on them, see the floating panel showing links to assignment
5. Try to click on the links.
1. Add some longer timeout to the panels. IIRC it used to be 300ms, enough to get the mouse into it.
2. Don't close the panel while the mouse is in it.