If you fail a map with a corruption nexus, the nexus is gone

This is pretty inconsistent behavior. Towers for example don't disappear if you fail them. And the problem is that this means the corruption surrounding the nexus will never go away. And you gotta grind a lot more to find a new nexus before you can get Atlas points.

I understand why it is possible to fail maps. And sure, if I die too much when playing a Nexus, sure, make me spend a whole new Waystone and start over. But losing the Nexus permanently is a bit much.