Great Audiobook App. Update brings problem though

Ive greatly enjoyed using this app for about 6 months. I was surprised to discover the first major bug Ive encountered which affects the playback position when locking/unlocking my phone. It wouldnt be nearly as big of a deal if the playback moved consistently, I could just move playback manually but it changes every single time. Sometimes a few seconds, then many seconds, then many minutes, even forward to parts I have not listened to yet.
Aside from the inconveniencing new bug, this app has served me well and I will continue to use it.

signalearth about Bookmobile Audiobook Player