Trivia: The film had a surprisingly fast production schedule. While the movie was announced shortly after the previous film, filming didn't begin until the end of January, 2019. The movie wrapped in May - only seven months before the release. By contrast, the previous film, "Welcome to the Jungle," wrapped filming a full year before release.
Trivia: The diner owner, Nora Shepherd, played by Bebe Neuwirth, appeared as the same character in the original 1995 Jumanji film.
Trivia: The picture of Milo and Eddie (Danny Glover and Danny DeVito) seen at the end in Nora's are real photos of Glover and DeVito, just photoshopped to be holding menus and to look like they're together in a restaurant. The photos of them comes from a 2008 fundraiser for Paul Newman's children's camp (The Painted Turtle) that doubled as a tribute to Newman, who had passed away a month prior to the event. Both men were in attendance.
Trivia: The film is often referred to as "Jumanji 2" in articles and publications, as it is a sequel to the 2017 film "Jumanji: Welcome to the Jungle." However, it's actually technically the fourth film in the series. The series starts with 1995's "Jumanji," followed by 2005's "Zathura: A Space Adventure" (which has been confirmed to take place in the same universe), followed by 2017's "Jumanji: Welcome to the Jungle," followed by this film.
Answer: He didn't die instantly because he didn't consume anything like Finbar did with the cake, his weakness to heat, sun, and sand is like the endurance he has and Finbar's strength and speed weakness it is simply a debuff on the character.