devtrackers.gg
Soo im trying to do the Alaska missions revealing the stalkers, that somehow stopped becoming invisible, thus making it impossible to complete unless i get the invisivility mutation.
With that mutation active i used the gas+scan grenade on several enemies including stalkers and the armored ones, did NOT work for the mission "reveal 3 enemies that are not stalkers" in the 4th set of study missions in Alaska but did work for weekly scans (accounted for after extraction, somehow obvious but i wanted to make that clear 
)
My guess is either it's bugged because i tried to scan an enemy that was made invisible (in a different match without any mutation active) by a stalker.
Will update this if i find out what's going on with this REACT malfunctions! =P