The answer is easy. You have just got bored with the delusion.
Ah, I am bored.
For example, if you keep reading the same comics, you will be bored, no matter how exciting the comics are. A delusion is the same. You seem very normal, at least regarding this matter. That is the reason why your fantasy tends to change radically. You see? Wasn't it unexpectedly easy?

P.1 2 3 4 5 6 7 8 9101112131415161718192021222324