Motorola Atrix 4G :: Notification Bar Voicemail Dialing Bug?

i get a voicemail and will use the notification bar voicemail notification to dial and listen to my voicemail, It will dial and connect and play my voicemail, but while in this call: I can slide up and down the notifcation bar, but any other input is simply ignored. The 4 home buttons on the bottom work, the finger print reader works but I can't select power off, I can't hangup the call since all main screen input is simply ignored. Once the voicemail call times out due to no input, and disconnects the call, the phone turns back to normal operations: I can select apps, widgets on the main portion of the screen. When I simply go to the dialer and select the voicemail entry in my phonebook or hold down the '1' key, the phone will call my voicemail and I can do/use all functions.