diff --git a/addons/stock/models/stock_move.py b/addons/stock/models/stock_move.py
index 735f0c53f94..25cc6163c9c 100644
--- a/addons/stock/models/stock_move.py
+++ b/addons/stock/models/stock_move.py
@@ -897,8 +897,11 @@ class StockMove(models.Model):
         """
         assigned_moves = self.env['stock.move']
         partially_available_moves = self.env['stock.move']
+        # Read the `reserved_availability` field of the moves out of the loop to prevent unwanted
+        # cache invalidation when actually reserving the move.
+        reserved_availability = {move: move.reserved_availability for move in self}
         for move in self.filtered(lambda m: m.state in ['confirmed', 'waiting', 'partially_available']):
-            missing_reserved_uom_quantity = move.product_uom_qty - move.reserved_availability
+            missing_reserved_uom_quantity = move.product_uom_qty - reserved_availability[move]
             missing_reserved_quantity = move.product_uom._compute_quantity(missing_reserved_uom_quantity, move.product_id.uom_id, rounding_method='HALF-UP')
             if move.location_id.should_bypass_reservation()\
                     or move.product_id.type == 'consu':