Backfeeder PLL noise bleed through

[Guardians of the analog]

Ok, I know this is a well documented issue. I looked up troubleshooting threads going back to 2019 about this one. Some people have built multiple boards with the same issues, any time it's been brought up the issue hasn't been resolved. @Robert is it possible it's a board/layout issue with some kind of bleed thru?

Yes, all my ICs, are from a reputable source. I have checked all solder joints, checked continuity, audio probed, triple checked values and checked all wiring. I even removed the feedback switch, rechecked continuity, hardwired, rewired the switch and it's still an issue. The pedal functions with it's intended purpose, the distortion works, even the feedback switch functions like it should. The rhythmic background noise is the issue. The video demonstrates the noise and how everything functions despite the noise.
Has anyone built one without the noise? Has anyone had one with this issue that found a solution? I have not seen many build reports and Chuck's build is the only one I've seen that does not mention it.

 

[Guardians of the analog]

If that's true, then the FB switch is backward. With the power off, measure continuity between pins 1 & 2. Should be open circuit. If it measures near zero Ohms, then the switch is backwards. You can either unsolder all 8 leads, rotate the switch 180° and then reconnect the leads per the Build Doc... OR you can move the wire from pin 3 to pin 1, from pin 6 to pin 4, and swap the wires that go to pins 7 & 9. The wire that's on pin 7 now probably won't reach.

---- BOARD ----
View attachment 41683

I think I typed that wrong. The PLL sound starts when the switch is depressed and stop when let go. The funky noise stops when depressed and starts back up again when released. The switch is wired correct. I did a continuity test and marked the open side before I soldered the wires to it.

 

[Chuck D. Bones]

OK, let's back up.
Using the audio probe on the points listed below, what do you hear when the FB switch is not pressed, what do you hear when it's pressed?
IC8-7
IC7-2
Q2-C