Updates needed please!

its great but I have to crop my video in order to put the transition where I want it to go and when Im saving it to my camera roll it freezes and crashes and I lose the video its super frustrating because I purchased all the packs to make good edits and it crashed while Im saving the video ): I have an iPhone version 9.2 please fix this bug

A Video Edit Lover about Vinema - Movie Transitions