It’s been a while since I last watched TLJ, so I don’t remember the exact scene well enough to know how well this would work, but just to spitball…would it be possible to cut out Maz’s hologram and show just enough of Finn, Rose, & Poe discussing the plan without her to convey the basics, then play Maz telling them how to identify the codebreaker as comm audio while their shuttle to Canto Bight is in hyperspace? Again, just a very rough idea, but might be worth experimenting with.