Yup. Which is why you need to be aware of it and train yourself on what to do. We actually do it frequently in in-service. This last time was 50% "uniform" and 50% "off duty/plain clothes" set up. The last 50% included the interacting with responding uniformed officers.
It's one of those gaps in the civilian training market. I've met few civilian-for-civilian trainers who've addressed anything post shooting other than a scan of the area. The few that have were generally giving terrible advice. I had a student say they were taught to call 911, say "there's been a shooting at XXX" then say nothing else. That's so fucking retarded I can't even begin to fathom why anyone though that was a good idea.
Thread drift, but that's why I prefer trainers to stay in their lane.