Why is garageband lagging with audiobus and crashing everytime?

Fricken ****, this is not the first time garageband crashed. I am using the iOS 7.something, the latest, and using the new iPad. Every time after I connect to audiobus and record with iMini or launch key or any other stuff, I will have to re-run garageband and close all those apps used to record, including audiobus. After getting back in, after I change chords or start editing the MIDI, the entire app jams and crashes. When I get back in, I lost everything, all the recording were into half or just a blank purple line. For those instruments, all the MIDI disappear and left a bright green bar there. Fix this in the next update and please add cut off and resonance filters to garageband -.-