diff --git a/addons/point_of_sale/static/src/app/utils/number_buffer_service.js b/addons/point_of_sale/static/src/app/utils/number_buffer_service.js
index d2c7be2f0f1..d1a68f0e497 100644
--- a/addons/point_of_sale/static/src/app/utils/number_buffer_service.js
+++ b/addons/point_of_sale/static/src/app/utils/number_buffer_service.js
@@ -161,7 +161,10 @@ class NumberBuffer extends EventBus {
             : 0;
     }
     _onKeyboardInput(event) {
-        return this._bufferEvents(this._onInput((event) => event.key))(event);
+        return (
+            this._currentBufferHolder &&
+            this._bufferEvents(this._onInput((event) => event.key))(event)
+        );
     }
     sendKey(key) {
         const event = new CustomEvent("", {