A few leds on when stopping ticker

[gcacciola]

Hello, first of all, thanks for the great code. It got me where I wanted from zero. I am facing a weird issue. Running 128x32 panel, when I run ‘docker-compose stop ticker’ I frequently get a few random pixels to keep light up at the panel while the rest turn off. This only happens when stopping this service. All other rpi-led-matrix shuts the display completely off. Any ideas why this is happening? Running rpi4, hat and gpio-slow=4 . Thanks!