Too buggy

This app used to be fantastic and one of my frequently used. Now its really buggy and wont let me download and listen at the same time. The interface is all screwy and it can be very unresponsive often. Please fix i need my audiobooks and I dont want to have to resort to using another app.

iOS 9.2 iphone 6s

going private in 15 mins about Audiobooks, v6.2.1