Default Bug With incoming caller with hidden caller id

Hi Zettlers,

I just had an incoming caller with hidden id and noticed a Bug after hanging up the Phone.
The call was still in the notification bar and was undeletable. Also the time was still counting. I even switched to plane Mode to make sure the call is really hang up but it was still counting.
After a reboot the notification was gone.
Anionen noticed this too?

Sent with Tapatalk through my Sony Z2