Map completion impossible: Arena, Barrow, Bone crypt

Hello! I'm new to maps so I might be doing something wrong but on average, I can't complete (i.e. get atlas points) in some 30% of maps despite meeting all the requirements, i.e. not having completed them before, making them blue, and killing the final boss (and all the monsters if that matters), as well as having the "map complete" message in the top-right corner. So far, this happened to me in the following maps:
- Bone crypt. Killed the necromancer and nothing happened. Tried again with another blue map and then it worked. Didn't take a screenshot here.

- Arena. Tried two times in vain. Killed all three bosses and all monsters, checked every cornmer, opened every chest - nothing.


- Barrow. Again, explored and killed everything, including the two main bear bosses - no point granted.



This is getting frustrating because I'm on Ruthless and it's not like I'm overflowing with maps here.

Thanks but how do I know know if a map is legacy? The game doesn't indicate it in any way.

As for Bone crypt, I completed it the second time and got a point, so the map is not legacy - which means the first failed completion (despite killing the necromancer) must have been a bug.

Nope - as I said, all these maps were blue, as indicated by the modifiers in the top-right corner.

I will pay attention to the map corners then. I understand I can simply exchange legacy to non-legacy maps with Kirac at a 1:1 ratio?

In any case, the game should be clearer about explaining this. I didn't find any explanation of legacy and non-legacy maps in the tutorial. And then again, Bone crypt must have been simply bugged as I managed to get my passive only after having done an identical blue map the second time.