IPAD Video Freezing

Cannot figure this out.
I have an mp3 loaded on one deck and the video loaded on another deck. When I press record to mix both decks, the video freezes for a few seconds when I hit my que point. I have use this app for two years and this has never happened. I believe the ios updates are killing the app.

current ios for my ipad 2 is 8.4 with the choice to update to 8.41

If you look at the video I did yesterday, notice how Nas freeze when I hit the que point. https://youtu.be/c1ZzbG5XeW4