here same problem
https://woodmart.xtemos.com/

Some user can move mouse from bottom-left corner to top-right (instead right). in this case, IMHO, previous mega-menu rectangle must remain (now it disappears).

We don’t need to restrict users. Why they should leave menu if move mouse athwart? I understand that you planned JS so, but it’s inconvenient. Hope, explained

for example:
https://www.ivory.co.il/

here in Hebrew (menu – from right – to left) bu you can see principle (nothing not disappearing). later I’ll prepare a movie.