Problem with CC-COI Fuger's Eastern Fury

[EskoH]

Hello!
I bought a CC-COI couple of months ago. I installed the game and it works fine (even on Win10).
I also tried a new campaign "Fuger's östliche Wut". It is nice feature and fun to play.
Everything went fine up to scenario "Final Days: Fuger's Eastern Fury" (i.e. almosto to the end). There I won the "start map" several times (major and/or decisive victory). Yet, after a short film clip (medal award / promotion ceremony) the game returns ALLWAYS back to the same scenario (star map), to same positions and to same roster!
How can I proceed and play the remaining 3...4 operations and accomplish the campaign?
Best thanks for your prompt reply!
Regards,
EskoH