Slideshow could not load images, paperpi crashes on exit

[txoof]

slideshow was running for several days displaying images every 10ish seconds.

will need to gather more data to reproduce.

  File "/home/pi/.local/share/virtualenvs/PaperPi-VBShxqF-/lib/python3.9/site-packages/epdlib/Screen.py", line 272, in wrapper
    obj.epd.epd.run()
  File "/home/pi/.local/share/virtualenvs/PaperPi-VBShxqF-/src/it8951/IT8951/interface.py", line 133, in run
    self.spi.write_cmd(Commands.SYS_RUN)
  File "spi.pyx", line 230, in IT8951.spi.SPI.write_cmd
  File "spi.pyx", line 177, in IT8951.spi.SPI.write
  File "spi.pyx", line 117, in IT8951.spi.SPI.transfer
  File "spi.pyx", line 108, in IT8951.spi.SPI.wait_ready
TimeoutError: Timed out waiting for display to respond

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/pi/src/PaperPi/./paperpi/paperpi.py", line 759, in <module>
    exit_code = main()
  File "/home/pi/src/PaperPi/./paperpi/paperpi.py", line 737, in main
    clean_up(cache, screen)
  File "/home/pi/src/PaperPi/./paperpi/paperpi.py", line 353, in clean_up
    screen.clearEPD()
  File "/home/pi/.local/share/virtualenvs/PaperPi-VBShxqF-/lib/python3.9/site-packages/epdlib/Screen.py", line 274, in wrapper
    raise ScreenError(f'failed to init display')
epdlib.Screen.ScreenError: failed to init display