Same problem here. Thanks for the tip on using the classic editor.
[Edit]
I just discovered that re-enabling the “Pre-publish Checks” in the page options also brings back the parent page selector. Must be either a bug or just another one of those weird choices by the team nobody understands. Well, at least got the option back now, I’ll just have to learn to live with the annoying pre-publish stuff now.
Great man,
I already solved the problem by using the plugin “Advanced Custom Fields” so I don’t see the default WordPress Custom Fields in my editor any longer. Really appreciate the feedback though. The way the alert boxes are shows is really nice.
Couldn’t agree more, Phil. Well said.