For the software, I'm using the python3 bindings from hzeller's rpi-rgb-led-matrix library.
The issue I am having is the matrix is interfering with the GPIO button. When the matrix is not configured, the button signals successfully (python print statement fires) when the matrix IS configured, the print statement does not fire and the top of my matrix flickers green. See attached images.
I don't know if it's a software issue or a hardware issue causing the inputs to clash. Any ideas what would cause this?