Raven Strike DLC Tactial Challenge issue

[HaserPL]

What the fuck is wrong with the Swift and Silent tactical challenge in the last mission of Raven Strike DLC? You have to make it across the bridge without triggering an alarm, 3 fucking hours of replaying that very first checkpoint, tried every possible strategy and I'm getting detected no matter what. The only guide showing this challenge is useless as well... Anyone had problems with this one as well?

 

EDIT: so I finally figured out how to do this challenge, hopefully, it will help someone. After you start the mission run to the bridge and take cover, you will need to eliminate all 4 enemies that are under the bridge, doesn't matter how you do it, just do it silently. Go under the bridge till the ladder, you will need to almost touch it so that the 4 enemies inside the APC will go out and take positions near the end of the bridge. You should have 4 enemies on the bridge now + an APC, and 4 enemies just across the bridge. Kill 4 guys on the bridge using sync shot, then do the same with the other 4 guys. Throw an EMP at the APC and follow with 3 grenades, and this should net you the challenge, provided you haven't got it unlocked already, for some people it is completed without even trying. APC has a ridiculous POV so be careful, also don't try to kill anyone near the APC until the enemies have exited it, it will always end up with an alarm. 

Edited May 12, 2021 by HaserPL

[bratMario]

I can confirm this. I was the one who had challenge marked as completed even though it was my 1st run (Mission #3, Challenge #1). So it is somehow glitched. I did all main game challenges  before started DLCs.