Losing Stone Golem buff

I'm playing a Headhunter/Charlatan Elementalist and I notice that sometimes I just don't have the health regeneration effect from Stone Golem. All my golems are alive, the other 3 buffs are on my buff bar, except the Stone Golem buff. It's most noticeable after I've cleared the map and am looting, with Steelskin-Lifetap slowly killing me when Stone Golem would regenerate significantly more than that costs.
I'm not running Less Regen maps. Unsocketing and resummoning will give me the life regen back.

My current theory is maybe Acceleration/Echoing Shrines with Frostblink of Wintry Blast moves me too far from it and they don't reapply the buff when they're back in range. Given the hectic nature of this build it's hard to know when I lose the buff though.

+1, having the same issue with a HH. Golem can hang litearlly next to me and provide no life regen. Resummoning fixes the issue temporarily.

I would concur that it is going too far from the golem with HH speed.