I ordered my iPhone 12 Pro Max today in graphite. After reading through this thread, I decided to get the Caudabe Sheath, which has been my go-to case for the XS Max. I think I might head over to Best Buy tomorrow and check out the Tech21 Evo Check case. I really wanted the Apple leather case, but I think I'll wait until more people report that the corners are no longer popping out. Thanks to everyone for the helpful suggestions.
I have 2 of the Apple leather cases and neither of them have that issue. I love their feel and fit. The more I handle them, the nicer they feel.