Nope. The "leader" in 120 roll film is paper, not film like with 35mm cassettes.
I do remember reading something about pulling the "paper" about 3-4 inches from the spool in the Hasselblad instructions for loading the film. I wondered if it was telling me to separate the paper from the film to load onto the takeup reel!
Aha, looking at some processed film now...the 35mm has a section that is black, before the usable frames start, and the 120 film starts right at frame #1. So when loading, you roll the 120 film to the arrow, then wind on until frame 1 is where the film actually starts.
So I guess the most likely explaination to the missing photos is film loaded wrong.