I wired it up as per the drawing in the document and there was no sound in bypass. I re wired the switch like this and it works. Thought I'd pass it along.
https://images.app.goo.gl/NVohNE3kdDDEeEHY7
Hey, just wanted to thank you for this post. I am building one of these right now and ran into the exact same problem, but with this re-wire it works great!