VVX500 - Screen stays off on buddy status change

I upgraded our VVX500 phones from 4.0.4.2906 to latest (5.6.0.17325).

We have power saving enabled so screen turns off. When one of the 11 buddies on the home screen has a status change (ringing, on call, etc) the screen doesn't come on like it used to.

Am I missing a option somewhere or is this something related to the phone system (Elastix 2.4 Asterisk 1.8)

Thanks