If they explain everything, then there's no fun in dissecting the episode and coming up with theories on what actually happened.
Except in both of those episodes, there's really nothing to dissect. It just happens and trying to come up with theories on why it happened is as pointless as it's relevance in future episodes. i.e. none. To have the solution to a problem involve something spontaneous and unexplained is just an easy way out for writers who end up just writing it off as "It's a mystery we may never solve!". Which we'll get to someday in The Royale.