Denerim Random Encounters Aren't Triggering

I've been playing a new playthrough of Origins, and when I reached Denerim for the first time, I only had one of the random encounters in the alleys trigger (the one where the enemies rig a tripwire to blow in the threshold). After that, only scripted story-related encounters will happen, such as Sgt. Kylon's quest-related one, and Taliesan's ambush. I thought that maybe if I tried going through the alleys again after reviving Eamon that maybe the encounters would work again, but they don't.

I am using a few new mods in this playthrough that I've never used before, most notably Improved Atmosphere, Grey Wardens of Ferelden, and a few dialogue tweaks. Other mods that I'm using that I have used successfully in previous games are Skip the Fade, Extra Dog Slot, Personal Annoyance Remover, and Character Respec (Raven).

Is there any fix for this? Maybe a console command to force the encounters? I'm mostly concerned about the encounter where you can find a Black Vial, but I would like the other encounters as well.