Fishing Fustration? The Mysteries of Fishing
My second suggestion is that there was something different between your presentations. It could be that you were using a heavier fishing line, had a snap swivel on your line, a different color jig, different amount of line off the reel, or a different weight for the bottom bouncer.
My third suggestion ties into the previous suggestion. It could be that your lure wasn't in the fish's strike zone. It might be that the amount of line off the reel kept the lure too high in the water column.
My last suggestion may sound trivial, but I've seen this happen countless times. It could be that you were fishing below the fish. Walleyes typically hold in a certain depth of water. It could be that your partner's side of the boat was in the fish's wheel house, or just above it. If so, you may have been fishing just below the fish. If so, you will not get many bites as the fish don't typically look below themselves.
There is a joke at the fishing lodge that I fish at when in Canada. if your partner is out-fishing you, just adjust the amount of anchor line out.
Good fishing and tight lines!!