The Missing Texture

This seems to be caused by placer not unhiding the icon when being removed:

function Placer:OnRemoveEntity()
	if self.builder ~= nil and self.hide_inv_icon then
		self.builder:PushEvent("onplacerhidden")
	end
end

It also makes sense to use self.hide_inv_icon only for invobject placers:

function Placer:SetBuilder(builder, recipe, invobject)
	self.builder = builder
	self.recipe = recipe
	self.invobject = invobject
	self.hide_inv_icon = self.hide_inv_icon and invobject ~= nil
	self.inst:StartWallUpdatingComponent(self)
end