Yes, I have had this happen a few times. One time it was my master builder *when I was trying to finish the last puzzle!* and he was my only one at the time, so I was very upset that he decide to play 'hide and seek' with me for over 30 minutes. Very weird. And he was over 65! When he finally 'appeared' he showed up around the kid's bathroom!

No idea what he was doing.. maybe it was an alien abduction! He was kind of lazy and weird after that..
