"moved" means attacked, moved, taken dmg etc. you can have a unit not move at all, just attacked and it will be considered as able to timeback, if you are lucky cause sometimes it just doesn't work in the same circumstances that it worked before. Ah well, one of many "small" bugs, like inquisitors not being able to cast holy anger on paladins sometimes, phantom spell not working on cyclopses, or this:
...demons humping guardian angels is just plain wrong, not because of moral issues, but because I could not move/select/cast anything on either of them...