Apple

This only happens while my iPhone is charging on it's side in StandBy mode. I have the StandBy mode set to show the clock, but starting a few days ago I noticed a green Phone call icon at the top of the clock view. I've tried clicking (ending call) and when I do it shows "ending call" to the last person I spoke with on the phone and it lists how long this ghost call has been going on (the time elapsed since I hung up the call with the person spoke with).

The first time I noticed this I forced restarted my phone and the green phone icon went away, but last night it showed up again.

Any help would be appreciated!