Hi all, just joined the forums after reading this thread.
It's definitely been an issue for me. I ordered a leather case from Apple to go with my 12 Pro Max and noticed the issue pretty early on when taking the phone out of my pocket. It seems to happen pretty easily by just walking up the stairs with the phone in my jeans pocket.
I returned the case to Apple and ordered another one from Amazon (UK), which is showing the exact same problem; so I am returning this one too. I am trying one more time and if this one (due for delivery today) shows the same issue I'll have to resort to a 3rd party case. This really sucks because I've loved the Apple leather cases on all previous phones. I think I'd rather try an Apple Silicone case before going down the 3rd party route, but I've seen similar reports for this case too?
I can't imagine Apple will invest in refining the design unless this blows up into a bigger story, which I can't see happening.