That's by design. They were originally DLC and it was a way to allow them to be replayed.

Perhaps we misunderstood. It should be saving your progress between play sessions but this does reset back after completing all 3 of the missions for each DLC so you can replay them. Is it not doing that?

That is really strange. Are you playing on Switch version? If so, we weren't involved with the port in any way, so Deep Silver support would be your best bet: techsupport@deepsilver.com

Shade level: 💯%