Corruption will sometimes not grow back after decay

[MisterGrimm]

Once a corruption node is destroyed the new corruption node will sometimes not grow over where the corruption decayed. Happens the most with propagator, but seems to be a sporadic issue that does not always happen.

Reproduction:

1. Set up a corruption node system, preferably with propagators. Other nodes can cause this issue, but not as often from experience.
2. Destroy a node in the corruption.
3. Let corruption completely decay.
4. Try to regrow corruption by placing down a new node.
5. Corruption will sometimes not grow from currently existing corruption.

[P-Kilian]

Possibility of a necro ability being placed on that tile. Leaves an empty asset after being destroyed. Corruption might think the tile is already covered with it.