Cut through plywood is inconsistent

The beam on the upper right was taken from the 1st mirror using 15% power, the bottom one on the hard paper was taken with nozzle from the worktable, focused as usual.
The left one with the fine(r) dot was taken with 20% from the tube with lens, i.e. this part:
image

I thought nozzle is just the part below the lens:
image

Did you mean to take one pulse without the lens at all ?