I cannot cross the bridge at chapter 2.

The player jump to the other side, but once I am there I do not regain mouse control.
The game is still running (animation and music are OK) but I cannot do anything anymore (eg : no mouse, pressing ESC do not show main menu). The only thing I can do is to close the game by pressing ALT-F4 (or clicking on cross window icon)

I have tried by starting sntrm.exe directly with -w -e parameters but it does not help. I use latest GOG FR version. Any help ?

EDIT : after trying lot of things, I came to conclusion that savegame must be broken.
I started a new game and it works, I can cross the bridge. It means I have to redo the whole chapter 2.

EDIT2 : I finally finished it. It's a great game but it crashes very often. It forced me to savegame every 5 min which disrupt gameplay a lot.