Framerate Freeze

[trophy345OBLITERATED]

Platform: iOS

So this has been happening for awhile. I play SM for about an hour (doing campaign, arena, or whatever) and at a certain point in time, the framerate goes from 50 to 1 and eventually crashes the app. The only way to remedy this is to just force-close and restart the app, but obviously this is annoying and just breaks the vibe.

I learned to anticipate the drop when I see a minor frame lag (hard to describe, but it's a half-second lag before it turns back to normal), but this shouldn't be the normal way to play... right?