Great app but huge flaw

I just spent 13$ on this app and everything works good, except it is unusable for me because when I go to export the video of my performance to my camera roll it just freezes when its about to finish and I cant save it. Which is the only reason I got for. Please fix this.

Mansillaj about VoiceJam Studio: Live Looper & Vocal Effects Processor, v1.6.00