It's never supposed to be turned off in custom quests unless the quest author explicitly does so. It is supposed to be enabled in all non-NES quests by default. Period. Since the rule to un-remove correct collision is new to 2.50, all non NES quests should have it by default.

I'm tired of dealing with this shit. Every time I fix it someone else breaks it.

Is there a bug report for this? Did a quest break somehow from this? Why even change it?