Powerful minions of rare not despawning

I killed the rare that has the 3 powerful minions and upon killing that rare and the minions they kept respawning. No matter which rare I killed and how many times I killed those 3 minions they kept respawning. Screen shot of map upper right corner https://i.postimg.cc/qR82fCrp/Screenshot-2025-02-17-130435.png