Great but one problem – GarageBand Review

I'm using this app for about 4 years now and I've made great music with it. It's incredible. But lately I've encountered a problem. I started downloading Vision and Verse but I left the app in the middle of download. When I returned it was almost downloaded so I waited. When it finished downloading I went to try some of the keyboards when i found out the sounds don't fully come. Like when you play a note the sound comes out and suddenly stops. I tried all of the keyboards and all of them were like this. At first i thought that its normal and has no problem but now I don't know.I want to use Vision and verse badly but I can't. Im not sure if Its a problem or not but I hope you answer me soon so I find out. Thanks
Review by FRZ02- on GarageBand.