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Yes, here is the board and schematic on KiCAD. Could it be that GND net is connected with trace rather than the zone?

Hi, I've been trying to make a bd-2 cline for a while. I have been encountering a weird high frequency noise when turning the volume and/or gain knob pretty high. This issue occurs on the pcb that I have made on kicad. On breadboard there are no issues. Another thing to point out is that the noise goes away if I have a buffered pedal running before this pedal. I am stuck on trying to figure out what the source of this problem is, and I am certain that the tracing on pcb is correct, as I've already made two versions and both seem to have the same issue.

Thanks for your response. My current circuit does not involve the anti-latch circuit. I will try it out though!
Here is the link to the schematic that I am currently using
https://i210.photobucket.com/albums/bb292/frequencycentral/LittleAngelMiracle.png

Hello,
I am currently building a PT2399 Little Angel Chorus right now for a friend of mine, but I came across an issue as follows:
The effect works, however, if I disconnect the power supply and connect it back again, the effect disappears. It is instead replaced by a clean signal. Then when I make a connection between 9V power supply and ground for a brief second, it will reboot the effect back again. This did not occur on breadboard, and I have also rebuilt the board from scratch, replaced the DC jack etc, but still cannot resolve the issue.