One pedal pump with the bleeder open or closed entrains very small bubbles into the brake fluid. Doing several just ensures that you wind up with them in the fluid in all the lines faster. They eventually settle out but you can not get rid of them in the first bleed. If you watch the fluid closely in a clear line, the big easy to see bubbles go away quickly in a few pumps per corner. If you continue, then what you will see is the fluid with 100's of very tiny bubbles start to come out. You can pump the master dry and they won't stop, they have to settle and then get bled out.
I've bled the brakes on 100's of TJs. Not once have I done so that I did not get a couple of small bubbles out of each corner. I made it a habit to start checking every TJ I worked on just to see. None did not have a couple of small bubbles at each corner. That is when I really started paying attention and doing the couple of pumps after the tiny bubbles settle out.
Pumping the pedal with the bleeder closed only makes it worse.