I ran into an issue with the 'editor view' mode in house design the other day...
When I came back to the world map I could not tap my character or others, use sword, items, etc, much like in the editor view.
I THINK recreation steps might be
1.) turn editor view on
2.) select an item of furniture (one which had been placed)
3.) leave area...
or something to that effect.
Anyway, after heading back into the house and toggling the editor view a few times,
it seemed to correct itself.