I drilled cuts and checked with DMM the board and could not found failure. With my telecaster sound is clean exept if I hit strings hard. I tested today pedal with humbuckers and made short sample with iPhone how it is acting.
I have built completely new board. The Board was not the issue. I changed transistors to pieces which has higher hfe. Now it's like a fuzz but crack sound is still there. Is the transistors bias causing annoying sound? Below is link to new sound sample.
Ok with that in mind it kinda narrows down the potential problems. Transistor selection and biasing are jumping out of course, but unfortunately I have not built this pedal so I can't offer very concise advice
One thing that would help would be to use an audio probe to see which transistor(s) has the issue
If it's right at the start, removing the 22K input resistor may help. You could just move the input wire down to the other leg of the 22K resistor to bypass it.
Some things to maybe tweak.. again if it's Q1 that's gating, adjusting the value of the 1K resistor from emitter to ground may help. You could try adding a bypass cap (typically electro 4.7uf to 47uf) from Q1 emitter to ground, parallel with that 1K resistor.
Of course collector resistors can be tweaked to adjust bias
Could be a bad cap too. If you have a bad batch of caps it could happen on more than one board. This is less likely the issue, but an audio probe would be a sure way to find out