diff --git a/addons/web/static/src/views/fields/numpad_decimal_hook.js b/addons/web/static/src/views/fields/numpad_decimal_hook.js
index 0b09ce165f3..e36e79f49bc 100644
--- a/addons/web/static/src/views/fields/numpad_decimal_hook.js
+++ b/addons/web/static/src/views/fields/numpad_decimal_hook.js
@@ -17,7 +17,6 @@ const { useRef, useEffect } = owl;
  */
 export function useNumpadDecimal() {
     const decimalPoint = localization.decimalPoint;
-    const listeners = [];
     const ref = useRef("numpadDecimal");
     const handler = (ev) => {
         if (
@@ -35,19 +34,15 @@ export function useNumpadDecimal() {
             "end"
         );
     };
-    useEffect(
-        (el) => {
-            if (el) {
-                const inputs = el.nodeName === "INPUT" ? [el] : el.querySelectorAll("input");
-                inputs.forEach((input) => {
-                    listeners.push(input);
-                    input.addEventListener("keydown", handler);
-                });
-            }
-            return () => {
-                listeners.forEach((input) => input.removeEventListener("keydown", handler));
-            };
-        },
-        () => [ref.el]
-    );
+    useEffect(() => {
+        let inputs = [];
+        const el = ref.el;
+        if (el) {
+            inputs = el.nodeName === "INPUT" ? [el] : el.querySelectorAll("input");
+            inputs.forEach((input) => input.addEventListener("keydown", handler));
+        }
+        return () => {
+            inputs.forEach((input) => input.removeEventListener("keydown", handler));
+        };
+    });
 }
diff --git a/addons/web/static/tests/views/fields/numeric_fields_tests.js b/addons/web/static/tests/views/fields/numeric_fields_tests.js
index f1efefdef36..ac378acda37 100644
--- a/addons/web/static/tests/views/fields/numeric_fields_tests.js
+++ b/addons/web/static/tests/views/fields/numeric_fields_tests.js
@@ -5,6 +5,10 @@ import { registry } from "@web/core/registry";
 import { click, getFixture, nextTick, patchWithCleanup } from "@web/../tests/helpers/utils";
 import { makeView, setupViewRegistries } from "@web/../tests/views/helpers";
 import { localization } from "@web/core/l10n/localization";
+import { useNumpadDecimal } from "@web/views/fields/numpad_decimal_hook";
+import { makeTestEnv } from "../../helpers/mock_env";
+
+const { Component, mount, useState, xml } = owl;
 
 let serverData;
 let target;
@@ -78,6 +82,7 @@ QUnit.module("Fields", (hooks) => {
         };
 
         setupViewRegistries();
+        patchWithCleanup(localization, { decimalPoint: ",", thousandsSep: "." });
     });
 
     QUnit.module("Numeric fields");
@@ -193,8 +198,6 @@ QUnit.module("Fields", (hooks) => {
     QUnit.test(
         "Numeric fields: NumpadDecimal key is different from the decimalPoint",
         async function (assert) {
-            patchWithCleanup(localization, { decimalPoint: ",", thousandsSep: "." });
-
             await makeView({
                 serverData,
                 type: "form",
@@ -223,7 +226,7 @@ QUnit.module("Fields", (hooks) => {
              * Common assertion steps are extracted in this procedure.
              *
              * @param {object} params
-             * @param {InputElement} params.el
+             * @param {HTMLInputElement} params.el
              * @param {[number, number]} params.selectionRange
              * @param {string} params.expectedValue
              * @param {string} params.msg
@@ -313,4 +316,62 @@ QUnit.module("Fields", (hooks) => {
             });
         }
     );
+
+    QUnit.test(
+        "useNumpadDecimal should synchronize handlers on input elements",
+        async function (assert) {
+            /**
+             * Takes an array of input elements and asserts that each has the correct event listener.
+             * @param {HTMLInputElement[]} inputEls
+             */
+            async function testInputElements(inputEls) {
+                for (const inputEl of inputEls) {
+                    inputEl.focus();
+                    const numpadDecimalEvent = new KeyboardEvent("keydown", {
+                        code: "NumpadDecimal",
+                        key: ".",
+                    });
+                    numpadDecimalEvent.preventDefault = () => assert.step("preventDefault");
+                    inputEl.dispatchEvent(numpadDecimalEvent);
+                    await nextTick();
+
+                    // dispatch an extra keydown event and assert that it's not default prevented
+                    const extraEvent = new KeyboardEvent("keydown", { code: "Digit1", key: "1" });
+                    extraEvent.preventDefault = () => {
+                        throw new Error("should not be default prevented");
+                    };
+                    inputEl.dispatchEvent(extraEvent);
+                    await nextTick();
+
+                    assert.verifySteps(["preventDefault"]);
+                }
+            }
+
+            class MyComponent extends Component {
+                setup() {
+                    useNumpadDecimal();
+                    this.state = useState({ showOtherInput: false });
+                }
+            }
+            MyComponent.template = xml`
+                <main t-ref="numpadDecimal">
+                    <input type="text" placeholder="input 1" />
+                    <input t-if="state.showOtherInput" type="text" placeholder="input 2" />
+                </main>
+            `;
+            const comp = await mount(MyComponent, target, { env: await makeTestEnv() });
+
+            // Initially, only one input should be rendered.
+            assert.containsOnce(target, "main > input");
+            await testInputElements(target.querySelectorAll("main > input"));
+
+            // We show the second input by manually updating the state.
+            comp.state.showOtherInput = true;
+            await nextTick();
+
+            // The second input should also be able to handle numpad decimal.
+            assert.containsN(target, "main > input", 2);
+            await testInputElements(target.querySelectorAll("main > input"));
+        }
+    );
 });