Detected cases when the game having a connection to the steam client saves all progress, but does not activate achievements.
The problem is most likely either in the work of the steam client, or in the third-party library used to interact with it.
I can not influence their work. It has been experimentally determined that when restarting the game activation of achievements works normally.
To solve this problem, and to avoid replaying previously completed pictures, we have added a forced activation of the achievement when selecting a level, if the picture is completed.
If you encounter this problem, restart the game and select the desired levels.