This is quite a coincidence as my fiance and I just got a pup that does the exact same thing (with exception of the kitchen thing). We can be playing and then all of a sudden she'll leave a surprise out of the blue (even if she already went in her spot outside). She has gone on the bed also ... she is crated much like the original post ... When I take her outside we run to her spot and no problem ... she does her thing.

BS