PsiEye: My guess is, that this quest might work for people who started with different Life Stories. For me, i've started as male Nomad.
I'm not getting phone call from Wakiko fixer ever, when i'm in next to the building or even in the same room where the Bugbear woman is.
I also can't pick up the mission item "Coolant" from bathroom, i can scan it but can't pick it up.
Actually no. I am also Nomad male and this is irrelevant. I have 2 saves one 30 min after another. Before my second save everything works fine, but not after. After I have the same situation as you described.
During those 30 min between saves something happened that caused this bug. I've made 3 assaults and spoken with 2 traders and when I tried to recreate this bug on purpose I've failed first time, but when I decided to play the game from the point before bug I've got this bug again, tried different options and couldn't find what exactly caused it.
So I just reloaded save and made this mission first. Luckily it was not too far.