The random encounter with Ron Staples, the recruitable legendary food vendor who's random encounter is a camping trip with 3 other scavengers, is still happening in the wasteland even if he has already been sent to a settlement and assigned to a shop.
I already had him recruited to my settlement, but then I found him again in the parking lot down the street of Concord Museum, along with his 3 scavenger buddies. However, as soon as he rendered along with his buddies, he immediately walked back to the settlement.
It's not a huge issue as long as he's going back to the settlement, but still... this event should not be happening once Ron has been recruited.
The wiki also mentions this -
http://fallout.wikia.com/wiki/Ron_Staples :
**After recruiting Ron and assigning him to a workshop, he may show up in a subsequent random encounter. He will disappear from the previous settlement, though he still counts under that settlement's population.[verified]**
Issue Data
Issue #22397: Ron Staples' random encounter event still happens even if he is already recruited