This may be related to my post over here:
In short, the game is now capped to the framerate of your monitor to prevent overexerting your GPU. I’d recommend looking at two things to ensure that they’re not interfering with the game:
- The refresh rate of your monitor
- Whether v-sync is enabled or disabled
Experiment with adjusting the settings and let me know if doing so works/does not work for you. If you continue to see issues, please be sure to include a copy of your dxdiag and any other information or details you can provide about your computer or the problem at hand.
Thanks for the report!