I Can't Shoot Up - Achievement Error report

Greetins everyone,

I’ve been granted with the achievement “I’ve Fallen and I Can’t Shoot Up”, but I shouldn’t have because I was summoning Stalkers in addition to colossus and probes.

I’ve Fallen and I Can’t Shoot Up (10 points) – Complete the “Unsealing the Past” mission by constructing only Probes and Colossus on Normal difficulty.

I was able to confirm this.

See my post here for details: