hey,
So finally i decided to spend some more time on this issue. What I find out, that ACF pro interferes with default wordpress functionally Automatically add new top-level pages to this menu
it sees post id from this nav_menu_item post_type, not page I’m publishing. That’s why there was no issue on pages with parents and when I was trying to update content(only on publish).
I hope it will help you to catch the bug and fix it. if you need any extra help from me, do no hesitate and ask:)
Regards
