This thread might be of interest to you:
Tl;dr see if the most recent alpha channel build is any more accurate for you as they overhauled some of the deltaTime calculation to be more stable.
Edit: oops @CityGen3D beat me to it.
This thread might be of interest to you:
Tl;dr see if the most recent alpha channel build is any more accurate for you as they overhauled some of the deltaTime calculation to be more stable.
Edit: oops @CityGen3D beat me to it.