Dishonored 2 freezes after a few minutes of play

Hi all! I've got a problem and I'm not sure how to approach it
I've got the GOG version of Dishonored 2, which installed and launches perfectly. It also runs well, with no performance issues. However, after some time (around 5 minutes), the game freezes - it stops taking inputs and nothing happens, although idle animations and sounds keep playing. Sometimes, this freeze also affects my OS, so I have to reboot. Is there anything I can do to stop this, or at least contain the damage so I don't have to reboot when it happens?
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