We still aren't quite sure what caused it. We don't know if we can still deal damage to them (we ran away). We do know that the skellies were still able to deal damage, even though they're outside the walls and really tiny. I can't remember the date we did it, probably Thursday? It was a gate with a Stratum 5 Gremlin series and then Vanaduke at Stratum 6, and it would rotate out in one or two days.
Funny enough, we also encountered this bug in the same level that day. Not sure if it's related or not ^^;
The Objects actually fell to the bottom of the map, so in reality they only appear smaller due to distance. BUT, because the hit boxes are only handled on the X/Y axis, you can hit (or be hit by) enemies at a different height. You just have to adjust for the 45 degree viewing angle.
Not sure about the statue though.... usually things fall under the play field when they do that.