Originally Posted by Shagjitsu

Hey, All,
As of this recent maintenance on 2016-10-06, 2-1 isn't spawning any special bonus levels anymore. Is anyone else seeing this? Did they just drop the spawn of the secret levels?

-Shag

Have not noticed any significant drop in frequency of 12-3 SGs so I doubt 2-1 is different, you're just unlucky.