TensorFlow Lite runtime does not exit cleanly with a ^C

[TCIII]

• rpi-deep-pantilt version: 1.1.0
• Python version: 3.7
• TensorFlow version: 2.0.2
• Operating System: Raspbian Buster Desktop

Description

TensorFlow Lite runtime does not exit cleanly with a ^C

What I Did

Exit rpi-deep-pantilt detect with a ^C

INFO: Initialized TensorFlow Lite runtime.
^CException in thread Thread-2:
Traceback (most recent call last):
  File "/usr/lib/python3.7/threading.py", line 917, in _bootstrap_inner
    self.run()
  File "/usr/lib/python3.7/threading.py", line 865, in run
    self._target(*self._args, **self._kwargs)
  File "/home/pi/rpi-deep-pantilt/.venv/lib/python3.7/site-packages/rpi_deep_pantilt/detect/camera.py", line 81, in render_overlay
    self.overlay.update(self.overlay_buff)
  File "/home/pi/rpi-deep-pantilt/.venv/lib/python3.7/site-packages/picamera/renderers.py", line 447, in update
    buf = self.renderer.inputs[0].get_buffer()
  File "/home/pi/rpi-deep-pantilt/.venv/lib/python3.7/site-packages/picamera/mmalobj.py", line 1141, in get_buffer
    'cannot get buffer from disabled port %s' % self.name)
picamera.exc.PiCameraPortDisabled: cannot get buffer from disabled port vc.ril.video_render:in:0: Argument is invalid