A couple of my runners have started as well... they drop them where they stand! Just this morning, I watched a chocolate runner do a little dance, drop an egg where she stood, then blast off to join the rest. And she was standing less than 2' from nesting area (inside the shed is straw and I put a doghouse top filled with straw next to the pen). It was kind of funny, but so far I have found one against a fence, one in the middle of the yard, and then the one this morning. Nothing anywhere near a box.
The swedish, however, have been clucking over and looking at the nesting areas... so maybe runners just have no nurturing instinct left. Or maybe its cause the process is new to them and they don't know any better what is happening.