Fails to recover if modules are removed and replaced

[xamindar]

If the modules are removed, the app will start spamming input/output errors and fail to recover when the modules are re-installed.
Here is some output until I killed the process:

Error sending command: write failed: [Errno 5] Input/output error
Error sending command: write failed: [Errno 5] Input/output error
Error sending command: write failed: [Errno 5] Input/output error
Error sending command: write failed: [Errno 5] Input/output error
Error sending command: write failed: [Errno 5] Input/output error
Error sending command: write failed: [Errno 5] Input/output error
Error sending command: write failed: [Errno 5] Input/output error
Error sending command: write failed: [Errno 5] Input/output error
Error sending command: write failed: [Errno 5] Input/output error
Error sending command: write failed: [Errno 5] Input/output error
Error sending command: write failed: [Errno 5] Input/output error
Error sending command: write failed: [Errno 5] Input/output error
Error sending command: write failed: [Errno 5] Input/output error
Error sending command: write failed: [Errno 5] Input/output error
Error sending command: write failed: [Errno 5] Input/output error
Error sending command: write failed: [Errno 5] Input/output error
Error sending command: write failed: [Errno 5] Input/output error
Error sending command: write failed: [Errno 5] Input/output error
Error sending command: write failed: [Errno 5] Input/output error
Error sending command: write failed: [Errno 5] Input/output error
Error sending command: write failed: [Errno 5] Input/output error
^CTraceback (most recent call last):
File "/home/xamindar/development/ledmatrix/Framework16/LED_MATRIX/app.py", line 175, in
main_loop()
~~~~~~~~~^^
File "/home/xamindar/development/ledmatrix/Framework16/LED_MATRIX/app.py", line 169, in main_loop
time.sleep(1)
~~~~~~~~~~^^^
KeyboardInterrupt