Lost items when my sim moved house. Can I stop this happening?

[Wai]

I have moved my sims many times, but tonight, when I moved my sim all the books vanished from the bookcase which I had placed in the household inventory (all the skills books in the game, recipes and dozens of reading books - a small fortune).  I also had a chest from China filled with dozens of artifacts, bars of metal worth a fortune and countless cut gems.  Its all gone along with a few other small items lincluding a surplus modlet manager and a collection helper.  Has this happened to anyone else?

I can't think of anythig I did differently this time so am wondering if this is a known bug or something that might have been caused by a recent update.  I'm pretty fed up as having moved my sims frequently previously I did not bother to make a backup copy of my household before the move.

Yuk! I've just discovered that my fridge was full of spoiled leftovers too!  Very odd.

Update:  I've just experimented by moving another sim, after buying some extra books and putting a few items in a storage box, and the same thing has happened again (no bad food this time though).

[Noodles]

I've lost the contents of a treasure chest when moving, too. I didn't save and tried again, but this time I put all the things to my sims' personal inventories. This way everything was saved.

It's kind of a pain to empty all the bookcases/chests into their inventories and then put everything back in but if you want to make sure you don't loose them, you should do this, as it seems to be a very common problem to have the items disappear. :/