I feel like they should've just turned it into a feature. Remove the crashing bit, allow people to do the undo zooming. Not every bug needs to be completely fixed, and it's something game developers do too much. Unintended behaviour that has cool gameplay effects or are just plain fun are removed because the developer didn't intend it ... even though players like the "bug". It's one of the reasons why I really don't like Blizzard anymore, and one of the things the Warframe devs did really, really right.