ADVENT does not extract supplies from the Extract Supplies mission if XCOM starts unconcealed

[Iridar]

I'm going on an extract supplies mission where you mark crates for Avenger to pick up before Advent gets them - lost city, fairly late game. As I hit the map I realize that one of the Dark Events is still active - the one where you start the mission without concealment.

My first thought is how is this going to work? Will the crates start getting marked and taken away after the first round? After I first encounter Advent? Normally it happens right after you break concealment and the fighting starts....

...but since I am not in concealment, there is no concealment to break, and Advent never marked any crates. I was able to take my time and get them all (even managed to lure a Sectopod away from the two crates he was standing next too before I blew him up). I guess its a combo of events that they never thought of when programming this mission type...

https://www.reddit.com/r/XCOM2/comments/1bgn9y1/well_thats_new_extract_supplies_mission/