Default [Q] Incoming Call

Does anybody else find their device becomes unresponsive, and unable to take a call, when you receive a call while using it? I can see the phone notification icon in the top-bar but can not answer the call as there's no on-screen "Answer" button. I can't pull down the menu, or use the app I'm in, or even press "Home". Anybody else had this? It happens in phone mode for me.
Lord of the Snarkô
Tempest [OmniROM] 4.4 (Manta) (m7att)