A few things i recently noticed.
1. Gwen only patrols at the evenings on weekdays, leaving weekends vulnerable on front door
2. When backtracking using the scroll wheel while a portrait is pulled up, the portrait lingers where is not supposed to be at. (e.g. Rachel's portrait appearing on the rehabilitation center outside scene when you backtrack after you call for her portrait to appear).
Edit: so far confirmed only works on visiting boss girls in the rehab center. Other characters are fine