I was helping my friend complete his Legend challenges for the Engineer and the maps we played today were The War Camp, Athel Yenlui, and Festering Ground.
War Camp- the first drop down in the area with the 1st tome, a Stormvermin patrol spawned right in front of us.
Festering Ground- the bridge after 1st grim location, a CW patrol spawned on top of us while we were crossing the bridge.
Athel Yenlui- in the ravine after the beginning part, a CW patrol spawned as soon as we walked past the chest.
I do not know how consistent the problem is as we only completed those maps once each but 3 facespawn patrols makes me believe the bug is back.