I can't quite explain how this happens, but I believe it is a persistent file in the missions. The mission level changes, but the mission parameters do not change.
If you take a bounty on any open world planet in StellPath mode drop mission, then go out and come back to hub, this creates a persistent file, and again join in open world you making enemies like stalkers appear and there are also exclusive drops of the mode.
I think this is a serious problem, and I would like a solution.
Tnx for all,