Impacted versions:
11.0

I don't know if it is an issue, but I think is strange.

`product_qty` is in unit of `product` : https://github.com/odoo/odoo/blob/11.0/addons/stock/models/stock_move.py#L240
`reserved_availability` is in unit of `stock.move` : https://github.com/odoo/odoo/blob/11.0/addons/stock/models/stock_move.py#L295

`move.product_qty - move.reserved_availability` seems to have no sens, no ?

https://github.com/odoo/odoo/blob/11.0/addons/stock/models/stock_move.py#L915
https://github.com/odoo/odoo/blob/11.0/addons/stock/models/stock_move.py#L917
https://github.com/odoo/odoo/blob/11.0/addons/stock/models/stock_move.py#L924

thank for your answer

@jco-odoo 
@alnslang 


addons/stock/tests/test_move.py
picking = self.env['stock.picking'].create({
            'location_id': self.supplier_location.id,
            'location_dest_id': self.stock_location.id,
            'picking_type_id': picking_type_id.id,
        })
        self.env['stock.move'].create({
            'name': 'move1',
            'location_id': self.supplier_location.id,
            'location_dest_id': self.stock_location.id,
            'picking_id': picking.id,
            'picking_type_id': picking_type_id.id,
            'product_id': product_id.id,
            'product_uom': self.uom_unit.id,
            'product_uom_qty': 5.0,
        })
        picking.action_confirm()
        for line in picking.move_line_ids:
            line.qty_done = line.product_uom_qty
        return picking
    def test_immediate_validate_5(self):