I seem to be having a problem with the Chemist quest.
I got it to trigger initially, and the game moved me to the Mall for the first meeting. But I can't find where to meet him. I'm at Evening, and next day Late Morning I get the "you stood me up" message. But no matter where I go, I can't find him in Evening, Night, or Early Morning.
I've got to be missing something.
Edit: Testing around, it appears that what happened is I got investigated and it skipped the Afternoon, meaning I missed the meeting - but then was given the event that put me in the Mall with the message to go to the meeting (after I'd already missed it).