The producers keep that sort of thing a tightly guarded secret, but the teams usually do exit interviews with some media outlets that cover reality tv and sometimes spill some secrets.
In this interview, they say they were held up about 45 minutes:
https://parade.com/tv/the-amazing-ra...ated-interview
Also, their crew never actually arrived, they were eventually allowed to continue with a spare crew that was there. What's weird is the crews all had local drivers, so they shouldn't have been the ones getting lost. Barbados is a pretty small island. You can drive from the northern tip of the island to the southern tip in less than an hour. It's rather amazing that a local driver was unable to get from one part of the island to another in 45 minutes.