Not sure if this is a bug or supposed to happen, but from a player perspective I think it's a bug.

If a new building construction begins, the full resources are taken away from the user. However, if the construction is cancelled midway and the building never completes the full resources are never returned. Instead, the resources returned are the same as if the building had finished and I reclaim it.

Is this a bug or done on purpose? Lost a few resources testing this out.