fns.startonenter in run_start of commonstates is called twice

in stategraphs/commonstates.lua:

name = "run_start",
        tags = { "moving", "running", "canrotate" },

        onenter = function(inst)
			if fns ~= nil and fns.startonenter ~= nil then
				fns.startonenter(inst)
			end
			if not delaystart then
	            inst.components.locomotor:RunForward()
			end
            inst.AnimState:PlayAnimation(get_loco_anim(inst, anims ~= nil and anims.startrun or nil, "run_pre"))
			if fns ~= nil and fns.startonenter ~= nil then
				fns.startonenter(inst)
			end
        end,

fns.startonenter gets called twice for the run_start state (line 305 in my current build of DST). As far as I'm aware, none of the vanilla mobs make use of fns.startonenter, but it can causes issues to modded mobs that might use them.