Spawning on gems(relics)

[Whoop365]

I have been playing with conjurer a a lot, and have noticed that you cannot spawn one over a relic on the board in coop or singleplayer. I'm not sure why that is, because you can spawn most other units on them. I also believe i was having some problems with spawning doppleganger twins on them.

The question is, is there a reason for this. I understand a portal cannot get a relics, but it would be cool to pick up the relics for my castle by spawning portals and gates over them.

Not only that, but it takes up spots that i want to spawn portals in!