It didn't help.
To be sure I understood correctly, i tried several things:
- Started the game from steam (i didn't start any missions)
- Pressed shift-tab to view steam overlay and clicked on achievements
- Pressed esc to return to the game
- Pressed shift-tab again to view steam overlay and clicked on achievements
- Pressed esc again to return to the game
- Pressed the Achievements button in the game menu
- Pressed esc again to return to the game
- Pressed the Achievements button in the game menu again
- Pressed esc again to return to the game
- Pressed alt-tab to go to the steam application and clicked on achievements
- Returned to the game
- Pressed alt-tab again to go to the steam application and pressed F5 to refresh achievements
It still reads 36/41