To understand it completely: there is a form A, from this form you open a form B, edit some data on form B, cancel form B --> on form A some attributes are now empty? I noticed the same effect a few times yesterday. My action was to empty browser cache with Ctrl-F5 and see whether it happens again. I didn't notice it since then. I would suggest you to press Ctrl-F5 and see if it happens again. I will also see if it happens again.