Low gravity and ladders

[fappymcfap]

I've yet to solve this issue and I've got no idea on how to do it. Whenever you have low gravity equipped in the pointshop and go on a ladder, low gravity stops working.
This is the current code I've been using.

ITEM.Name = 'Low Gravity'
ITEM.Price = 50000
ITEM.Model = 'models/props_junk/GlassBottle01a.mdl'
ITEM.NoPreview = true
local gravity = 0.25 

function ITEM:OnEquip(ply)
	ply:SetGravity(gravity)
end

function ITEM:OnHolster(ply)
	ply:SetGravity(1)
end

function ITEM:OnSell(ply)
    ply:SetGravity(1)
end