Unified SDK iOS memory warnings

Hello,
We are getting crashes when using the Zendesk UNIFIED SDK IOS version (Objective-c). After we open and close the Help Center a few times our app crashes with memory warnings. I believe it is an out of memory issue. I would like to know the best way to release (deallocate) memory right after I close the Help Center Screen.
Is this memory issue a known error? Can we have more control over the ticket creation screen and the Help Center screen?