A few weeks ago a conductor on the train was making announcements that bags/luggage should only go in the racks or under seats and not to use the overhead racks except for coats (a moot point in the heat). Hadn’t heard it again since.
Today I am on a 730/2 and it has been adorned with dozens of stickers saying “don’t put luggage here” on the overhead racking.

I recall there being issues with the glass cracking on some racks during introduction, but that’s seemingly resolved.
Is it because it’s too easy to put a case on the bracket and have the item fall out?
Or maybe the suspension is hard enough to shake items out the racks?
Today I am on a 730/2 and it has been adorned with dozens of stickers saying “don’t put luggage here” on the overhead racking.

I recall there being issues with the glass cracking on some racks during introduction, but that’s seemingly resolved.
Is it because it’s too easy to put a case on the bracket and have the item fall out?
Or maybe the suspension is hard enough to shake items out the racks?