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/models/stock_move.py
# 
            # 
            # 
            # 
            if recompute:
                move.recompute()
        return True
    def _assign_picking_post_process(self, new=False):
        pass
    def _get_new_picking_values(self):
        """ Prepares a new picking for this move as it could not be assigned to
        another picking. This method is designed to be inherited. """
        return {
            'origin': self.origin,
            'company_id': self.company_id.id,
            'move_type': self.group_id and self.group_id.move_type or 'direct',
            'partner_id': self.partner_id.id,
            'picking_type_id': self.picking_type_id.id,
            'location_id': self.location_id.id,
            'location_dest_id': self.location_dest_id.id,
        }
    def _action_confirm(self, merge=True, merge_into=False):
        """ Confirms stock move or put it in waiting if it's linked to another move.
        :param: merge: According to this boolean, a newly confirmed move will be merged
        in another move of the same picking sharing its characteristics.
        """
        move_create_proc = self.env['stock.move']
        move_to_confirm = self.env['stock.move']
        move_waiting = self.env['stock.move']
        to_assign = {}