French Giants - Achievement Bug

[Secritek]

In the 6th mission of the Blitzkrieg France campaign, one of the objectives is Kill the Elite French Scouts.
After finding the elite gold chevron french scout unit and utterly obliterating it with tanks, nothing happened.
When i've completed the mission the star remained unticked and achievement still locked.

Again, the star can be unlocked by My Documents/My Games/BBCBA/Saves and opening the CAMPAIGNS_4FRANCE.ach file.
There, adding the following line unlocks the star:

ACH CAMPAIGNS/4FRANCE/SCENARIOS/FRANCE6.BAM#ACHIEVEMENT_KILLSNIPERS

Problem is, i do not want to keep doing that everytime a mission fails to check if a set objective has been completed :c.
After scouring the code of the said mission, my only uneducated guess would be that the game fails to acknowledge the FRENCH_SCOUT as the needed "snipers" unit because it was never set as them, therefore, the non-existing unit cant die x-x
Proof to this is the fact that the scouts do not behave by the code. Their position should be randomized and they should run if they are spotted. They do not run when spotted and they always spawn in the topmost house just behind the northern church.