Brief description of the issue: after last updated (hot fix 1.11.7.0), when the g-sync is enabled the in-game fps value keeps staying below 18 (they feel like 6 or 7 not more);
Provide Screenshot(s)/video(s) of the issue encountered:  
Detail steps to solve the issue encountered: disable g-sync from the nvidia control panel and re-launch the game, hope this can help you as well 😉