Thanks for the fast reply. I have not yet looked into this, but will do so very soon. And yes i'm highly considering buying the add-on, german campain looks pretty nice!
Funny thing that Ubisoft can produce such great games, and yet make such a mess with compatibility and reliability.
But IMO all great games have big mistakes. It's almost like driving old italian sportscars.
I will go through the compatibility options now and see what happens. Then i will do the reinstallation and report if that helped.
Edit: So that fix did not help at all, replacing the file with the old one also causes the periscope animation to disappear again. I hoped, the animation is done by another file.
Ran through all compatibility options with no noticable difference. I guess i really need that file from this ancient fix posted here. If anyone still has it, please report to me. I would be really grateful.
If there is no help left, I guess I just have to buy the addon.