Cliff banners separate villagers
When placing the starting banner, if you place it near the top edge of a cliff, the villagers arrive but are split up, with some above the cliff, and some below.
Steps to reproduce
At the start of a game, place the banner next to the top edge of a cliff.
“Invalid banner placement. Please try again.”
The villagers appear as normal, except some are forced to go onto the lower level. The fireplace may have to as well.
Picture (ignore the whiteness)