Table html properties got lost after saving and closing

I created a table in a rich text field, and added:BORDER=“1” BORDER=0 CELLSPACING=0 CELLPADDING=0

to the other property of the table.

They disappeared after I saved and closed, then re-open the document.

I found out the reason is that I’ve ticked the option Store contents as HTML and MIME of the rich text field. So if I untick the option, my table html properties got persisted ok.

Is this the expected behaviour?

Thanks and regards,