Notification does not disappear if the call doesn't start

[natema]

When I try to start a call when there is poor connection, and the phone automatically hang up, the notification saying that Call Recorder is recording does not go away. I have to kill the application in order to get rid of it.
To replicate, put the phone in airplane mode and start a call.
My phone is a OnePlus with Cyanogen OS 12.1, but I've experienced the bug with previous OS.
Keep up the good work!