Wanted to let you know I think the jumping issue may be tied to high refresh rate monitors? I originally played it on a 144hz G-SYNC monitor and had the jumping issues, the frame deltas would be much smaller (6.94ms)... However I tried it on a cheapo typical 60hz (16.6ms) display and the jumping was fine! I can't say for sure if that is the issue, but it might be worth looking into?