The latest (5.3) rules update gave us this rules change to impetuous. "Restriction: Impetuous Troopers cannot enter Marker States (Camouflaged, Impersonation...), or any other States that say so. Furthermore, they cannot enter Prone state at the end of the Order." Can impetuous trooper go prone after movement? Can impetuous trooper go prone after failing a guts check? The reason why I'm asking is that unlike with the minelayer* change, CB didn't write the a RAI (rules an intended) for the impetuous change ("Adjusted the restriction on the Impetuous skill.") * The minelayer RAW (rules as written) is ambiquous but RAI is very clear based on the change log ("Clarified Minelayer skill to prevent an exploit when deploying deployable repeaters.").
I suggest simply ignoring this FAQ. This is a discussion I had on Discord earlier. https://discord.com/channels/118301609146056709/617207022965882913/1544390003944194210