I'm pretty sure I got all the powerups! Unless if anything the 3 superclone powerups under the lava fountain didn't register because many died there so maybe the powerups didn't register as taken (as in the clones don't have enough time to spawn).
I moved FBI's and Vicvic's previous posts to this thread, more on-topic here. It's about the new Surefire achievement which was added with the Warpzone update: Collected all powerups in Supersonic by only tapping the left side of the screen This may well be the reason. I tried to be slow at this point and got them. Got the achievement, too, though at the end of the part with the many saws I had only one surviving clone.
Finally got the Surefire achivevement! Got it first on Android so figured out it probably wasn't bugged like I thought. Now got that achievement on both iOS and Android!