Betrayal from QeynosFollow

You will need to remove from your house and your house vault any items that you wish to keep. Your house will go *poof* along with anything in it when you become an Exile. You should be able to store it all in the bank and be fine, but you can not leave it in your house if you want to keep it.

Well, here's my thinking. Under the new moving crate process your furnishings are being cut over to the new housing instance immediately. They aren't being held or stored anywhere for an interim period. In the case of a betrayal however your original home goes away when you become an exile and there is no "deposit point" (ie: a new home you purchased) for your stuff. There are no housing options in Haven and I would imagine that it is unlikely that your house contents/moving crate data would be stored in limbo indefinitely (some people are Exiles for days, weeks or longer), waiting for the day you decide to finish the betrayal and then later buy housing.

If anything I would say that banking any valuable house items that you don't want to lose would be prudent, just in case.