It's been resolved, but the problem is still present in latest version (at least for me) - 0008299 http://feedback.arma3.com/view.php?id=8299
No mods
version: 0.59.105679
Observation: -in combat pace using optics while moving changes to jogging
(weapon is lowered and moving faster) -in jogging using optics while moving changes to combat pace (weapon is ready to fire and moving slower)