Channel 3 Pitch-Bend Issue

[tadashibashi]

While using pitch bend in the wave channel, a popping occurs whenever the PB is brought back to value 64. After a good number of pops the channel's waveform will change (audibly but not on the display). In order to restore the original waveform, I need to move the waveform manually to a different shape and then toggle back to the original shape.

I am using Arduinoboy software 1.3.3, a DMG-01 Play-it-Loud, and an Arduinoboy made by Xiwi Electronics.