Last time I stuck my head in the MA, said dialogue always pops up when you first step into the map, sadly. It's a bug. Check your chat window when you first walk in and see if that's happening.
Also, are you playing something with stealth? Sometimes dialog doesn't spawn when you're in a stealthed state.
I'm working on my first MA arc and I can't seem to get the dialogue to work in certain circumstances. At least during testing, the enemy unaware and attack and captive inactive and active dialogue never shows up.
Anyone know why? What am I doing wrong? I guess it's not essential to the arc but i have some nice humorous bits playing out there. Would hate to lose 'em.
Cryosteel 46 ice/ice Blaster
Bonfire Blaze 25 Fire/Fire Blaster
Dream of Shadows 25 Staff/Willpower Scrapper
+ 17 alts