Random "All Buttons Pressed/Released" Tick

[Basilicum]

Hi!
I just got the whole PS2Controller+Reciever stuff for the Arduino and tried this along with its test code.
However, I noticed a weird bug? Where every new and then, the serial monitor will be spammed with every single button press/release message there is. And I'm not really sure why?
I tried it with several Arduinos I have (I have too many...) in fear that some may be broken, but that was not the case...
I followed the tutorial and guide to a Tee, and otherwise it works perfectly fine. Just that at least once or twice every thirty seconds everything seems to get pressed at once.