[Fern]

When Eyes of Elimination or Divine Eyes' animation/mini-game begins, the music jarringly (and probably unintentionally) stops for a bit, then resumes.
 
Also occurs with Freezing Cyclone Spear when the ice tiles are generated.

[Snake]

This also resets your volume settings.

[Neus]

Eyes of Elimination is supposed to stop the music, but I've corrected it messing with your music volume.

Crystal Rose probably just generates too many tiles and sound effects, and has been corrected.