This is an issue we are current looking that appears to be related to framerate. There are two known workarounds so you can continue your playthrough. Please read below for more.
- Option #1 - If you are using a 60Hz screen, you can enable V-sync to bring their framerate back to 60. This will not work for users with a high refresh rate monitor (120Hz, 144Hz)
- Option #2 - Switch to Exclusive Fullscreen and then set the Refresh Rate to 60Hz or lower. This should work for everyone, regardless if they have a high refresh rate monitor or not.
After changing these setting restart from the previous checkpoint. The workaround will not work if you do not restart from previous checkpoint.
Once you have passed the Spiderhack Story Mission you should be able to return your game settings back to there original state.