It's what avatars do from time to time unfortunately.
Maybe your avatar is 1000% honest and can't morally stick around to watch you thieve
My clan has 3 avatars. and two of them make a habit of disappearing on a regular basis, the third one seems to be much more stable and likely to hang around. But we have no idea why they would act any differently.
It's a pain just thought i would ask to see if others get the same problem. Perhaps you're right! He doesn't like to stand around all day and would rather do his own thing
Thanks for the response