Cgs synth

hey there

i did the mod where you connect the pin 5 of tl072 to the output of
the saw. however it still only works with pwm. BUT when i try to
connect the saw out to pin 6, it works fine.
what is going on?

i have cut the jumper that goes from pin 5 (is that the same as
cutting the trace to the jumper?

thanks