Playing a Beastmaster and using Summon Wolf in campaign.
I summon 5 wolves simultaneously and they are grouped, but when using the Town Portal then coming back to the current map, only 2 wolves are summoned, and they are split rather than grouped.
When transitioning to a new map, the wolves are grouped again.
I have attached pics to show the 2 remaining which are split, the 3 grouped after using SW again, my gear, and the current skill set-up.
Summon Wolf Unsummoning and Splitting