I’m not sure if this is the correct place to request bug fixes, but it seems that the Q106 Oscillator is exhibiting clicks and pops when modulating the pulse width at audio rates. A similar bug was present in other oscillators that used the VCV VCO MinBLEP implementation (now fixed in the VCV VCO) as a reference. Here is a link to that topic: Clicks and Pops from PWM I’ve included a few screenshots of the scope showing this issue.
Thanks!