If she was targeted by modern day pirates, aka cartels, who had someone placed on the ship who had obvious clearance, how hard would it be to remove her via the loading docks.
Or, as CoolJ mentioned, maybe she walked off the ship with a crew or band member under the auspice of getting cigarettes.
Also She was seen taking a drink from Yellow before she disappeared. Was that when she was drugged, and then somehow smuggled off the ship?
Who knows how, if these are human traffickers, aka cartels, they certainly have their ways, and they have connections everywhere including on these ships. If anyone is surprised by this, I know I’m not. Especially with the apparently lax security... remember, no videos of anything that night. Remember how RC refused to close down the ship to search, or try and prevent her being removed. How they did not thoroughly search as they claimed they had. I’m like, seriously? Too many red flags. IMO.