I just got my Harmony cartridge in the mail and tried to load Space Invaders. Works fine, but the main player gun changes width randomly. In the Stella emulator, it remains the same width as expected.
I think I may have seen this happen on another cartridge, in Super Breakout, though, randomly changing the width of the paddle even when it isn't supposed to.
Has anyone seen anything like this happen? Is it more likely to be the harmony cartridge or maybe a dirty contact on the cartridge port, or even something starting to go bad in the TIA chip?