Originally Posted by
Silver Serpent
Does Bank2 draw more current than the other banks? Do you have a specific color combination that could be drawing enough current to cause issues with your battery pack? If the pack is low or weak, or the PCB is getting tripped from a higher draw on bank2, then that could be a possibility. Try giving bank2 identical settings (color, flicker, everything) to a known good bank. If it still causes problems, you could have one or two glitchy sound files. It's possible one of the swing files is corrupt.
You've already swapped SD cards, so no sense trying that again. It's unlikely you have two cards bad in the exact same way.