Removing banners from a wall crashes the app on iOS and makes the Realm unavailable for a couple minutes.

Removing banners from a wall crashes the app on iOS and makes the Realm unavailable for a couple minutes.

This is easy to reproduce - place a banner on a wall, then use a pick axe to remove it. The app will crash and the Realm becomes unvailable for a couple minutes aftwards.

This happens every time I try to remove a banner from a wall.