There was a small bug which did not allow to save certain SQMs within several houses (not many though) and this issue was taken care of and won't cause any more issues. However, I'm afraid we cannot give any items back since those objects were corrupted and there is no way of knowing what was lost. We are really sorry for that.
As a compensation we did decide to give 30 days of premium to anyone who lost something within a house. Please contact CM Madragor in game for that matter and please explain everything to him (including the details of your issue), so we can confirm it.