Except it's not "non-obvious" at all, but highly obvious.

The people who designed the facade are not the same group that models the behavior under certain conditions? Well, that's apparently stupid, and somebody in the first group should have said, hey, where does this thing focus sunlight?

At some point, somebody drew a giant curved reflective surface and failed to consider what it would do to the sunlight. That is dumb. I don't see any way around that.