I don't think there's a thread for this yet. In the Random Wishmaster Challenge, I have repeatedly had problems when I have taken one of my sims travelling. I believe others are also having trouble but I don't know the specifics of their problems.
Here's what has happened to me: One of my sims came back from China cloned. I deleted the clone, but next time that same sim travelled, she completely disappeared. I was there in China but there was no sim anywhere, including no icon at the left side of the screen. I scrapped that game and those characters. Created new characters with the same traits and started over. In my present game, one of the other characters had been travelling with no problems. But the first time I took the Jane character travelling (the one with the same traits as in the first game), she did not return from the trip. I found her in her sister's relationship panel listed as a foreign resident, and was able to get her to rejoin the household by inviting her to visit, socializing, and getting her to move back in. But everything from her inventory was gone, including the collection helper, motorcycle, fish, etc, etc. Even the food replicator from the family inventory.
I'm wondering if it's just chance that both times, the problems were with this particular character. The only significant difference between her and the other 3 in my game - that I can think of - is that she is the only one that has any of the new Ambitions traits (eco-friendly). Could that possibly have anything to do with it? Maybe I'm grasping at straws, but I'm trying to figure this out.
What sort of problems have other people had, and has anyone found a solution? Is there any pattern to this?