If you enter a Planetary Piano machine to play 8-key while a demo for 4-key mode is playing (vs or single-player), the camera is offset to the left side, rather than to the center as expected.
Play a game of 8-key Planetary Piano (any mode) while a 4-key mode demo is playing.
The camera is centered, as normal.
The camera is offset to the left side, as seen in 4-key modes.
Other misc notes about the bug. Picture or videos would be much appreciated!