Eli Zaretskii <eliz@gnu.org> writes:

Thanks a lot for your help.

> Can you see if clear_mouse_face is ever called from any other place,
> when the highlighting isn't cleared when you move the mouse pointer to
> another line of text in the same window?  If there _are_ any other
> places from which clear_mouse_face is called, could you please show
> the full contents of the hlinfo struct when it arrives in
> clear_mouse_face in those other call sequences?