The ToolTip feature does not work very well with Text Objects, (Editor, Display or Labels).
If you hover on top of one of these objects, you need to stop moving the cursor immediately, otherwise the ToolTip text disappears.
With other kind of objects, you can keep moving the cursor as long as it doesn’t exit the object and the ToolTip remains visible.
Anyone else experiencing this problem?
Tested in Mojave and Monterey.