Recently having a small but slightly annoying issue with OMP I'd like to share.

Intermittantly, if OMP is showing Now Playing screen in the background and you make/recieve a call.
On the call ending the screen goes black and the device locks up for a few seconds.

When it finally sorts it's self out, task switcher is shown and OMP has jumped back a page (to the playlist menu).

The only thing I can think of causing this, is I have recently set the phone application to portrait only from auto.