Starfall crater is not getting miraged

I saw this bug or not bug, to be determined:

Opened a map,
Found starfall crater,
Next to it was mirage
Went inside mirage
Instead of starfall there was something else there

Proof uploaded as video
https://youtu.be/P7FjnGYUphg

this isn't a bug.

I have ran around 1000 vaal temple where I have entered the mirage too, and not a single time I've seen starfall crater in there either... whereas on normals I've seen quite a few