I am the same , I put about 1/4" freeplay on the twist throttle to stop this.I have a dual gasser throttle, w/ both thumb and twist. Thumb for when/if others ride. But I love twist. Only problem is just like on a dirtbike, when you get really fatigued and you hit a bump, it's hard to control it LOL.
I also come from a dirtbike up bringing , could not get used to the thumb throttle.