Update: We checked on this later in the day and My Disney Experience showed that all of these attractions had reopened.
Disney World might be the most magical place on earth, but rides there can experience technical difficulties at times, causing them to temporarily close.
Sometimes these closures are only for a few minutes, but other times they can last for much longer. As we walked around Magic Kingdom today, we actually found that 3 rides are ALL temporarily closed right now due to technical difficulties.