Problem removing item from the end of a list.

I have a problem using the “remove item from end of <list>“ command - when I try to use it, I always get an error message. The message is similar to that I get when I try to remove something from a list and what I’m trying to remove isn’t there - but it seems like there should always be an item at the end of the list unless the list is completely empty.

The attached world illustrates the problem. As set up, it works fine - the bunny moves from cone to cone around a circle, going to one less cone each loop.

However if I substitute “remove item from end ...” for “remove item from position ...” I get an error - even though these should be equivalent commands. Looks to me like this is a real bug - anyone see anything I’m missing?