diff --git a/addons/web/static/src/js/fields/abstract_field.js b/addons/web/static/src/js/fields/abstract_field.js
index ab6f226a66e..16e928ea288 100644
--- a/addons/web/static/src/js/fields/abstract_field.js
+++ b/addons/web/static/src/js/fields/abstract_field.js
@@ -403,6 +403,18 @@ var AbstractField = Widget.extend({
     _getClassFromDecoration: function (decoration) {
         return `text-${decoration.split('-')[1]}`;
     },
+    /**
+     * Compares the given value with the last value that has been set.
+     * Note that we compare unparsed values. Handles the special case where no
+     * value has been set yet, and the given value is the empty string.
+     *
+     * @private
+     * @param {any} value
+     * @returns {boolean} true iff values are the same
+     */
+    _isLastSetValue: function (value) {
+        return this.lastSetValue === value || (this.value === false && value === '');
+    },
     /**
      * This method check if a value is the same as the current value of the
      * field.  For example, a fieldDate widget might want to use the moment
@@ -499,9 +511,8 @@ var AbstractField = Widget.extend({
      * @returns {Promise}
      */
     _setValue: function (value, options) {
-        // we try to avoid doing useless work, if the value given has not
-        // changed.  Note that we compare the unparsed values.
-        if (this.lastSetValue === value || (this.value === false && value === '')) {
+        // we try to avoid doing useless work, if the value given has not changed.
+        if (this._isLastSetValue(value)) {
             return Promise.resolve();
         }
         this.lastSetValue = value;
diff --git a/addons/web/static/src/js/fields/abstract_field_owl.js b/addons/web/static/src/js/fields/abstract_field_owl.js
index f97faae35ed..43e3d468d78 100644
--- a/addons/web/static/src/js/fields/abstract_field_owl.js
+++ b/addons/web/static/src/js/fields/abstract_field_owl.js
@@ -453,6 +453,18 @@ odoo.define('web.AbstractFieldOwl', function (require) {
         _getClassFromDecoration(decoration) {
             return `text-${decoration.split('-')[1]}`;
         }
+        /**
+         * Compares the given value with the last value that has been set.
+         * Note that we compare unparsed values. Handles the special case where no
+         * value has been set yet, and the given value is the empty string.
+         *
+         * @private
+         * @param {any} value
+         * @returns {boolean} true iff values are the same
+         */
+        _isLastSetValue(value) {
+            return this._lastSetValue === value || (this.value === false && value === '');
+        }
         /**
          * This method check if a value is the same as the current value of the
          * field. For example, a fieldDate component might want to use the moment
@@ -498,9 +510,8 @@ odoo.define('web.AbstractFieldOwl', function (require) {
          * @returns {Promise}
          */
         _setValue(value, options) {
-            // we try to avoid doing useless work, if the value given has not
-            // changed.  Note that we compare the unparsed values.
-            if (this._lastSetValue === value || (this.value === false && value === '')) {
+            // we try to avoid doing useless work, if the value given has not changed.
+            if (this._isLastSetValue(value)) {
                 return Promise.resolve();
             }
             this._lastSetValue = value;
diff --git a/addons/web/static/src/js/fields/basic_fields.js b/addons/web/static/src/js/fields/basic_fields.js
index bf225d7ea99..d5f1f1074d4 100644
--- a/addons/web/static/src/js/fields/basic_fields.js
+++ b/addons/web/static/src/js/fields/basic_fields.js
@@ -326,7 +326,7 @@ var InputField = DebouncedField.extend({
      * @private
      */
     _onInput: function () {
-        this.isDirty = true;
+        this.isDirty = !this._isLastSetValue(this.$input.val());
         this._doDebouncedAction();
     },
     /**
diff --git a/addons/web/static/tests/fields/basic_fields_tests.js b/addons/web/static/tests/fields/basic_fields_tests.js
index c7040a98744..3d98ea984e7 100644
--- a/addons/web/static/tests/fields/basic_fields_tests.js
+++ b/addons/web/static/tests/fields/basic_fields_tests.js
@@ -1743,6 +1743,54 @@ QUnit.module('basic_fields', {
         form.destroy();
     });
 
+    QUnit.test('input field: set and remove value, then wait for onchange', async function (assert) {
+        assert.expect(2);
+
+        this.data.partner.onchanges = {
+            product_id(obj) {
+                obj.foo = obj.product_id ? "onchange value" : false;
+            },
+        };
+
+        let def;
+        const form = await createView({
+            View: FormView,
+            model: 'partner',
+            data: this.data,
+            arch: `
+                <form>
+                    <field name="p">
+                        <tree editable="bottom">
+                            <field name="product_id"/>
+                            <field name="foo"/>
+                        </tree>
+                    </field>
+                </form>`,
+            async mockRPC(route, args) {
+                const result = this._super(...arguments);
+                if (args.method === "onchange") {
+                    await Promise.resolve(def);
+                }
+                return result;
+            },
+            fieldDebounce: 1000, // needed to accurately mock what really happens
+        });
+
+        await testUtils.dom.click(form.$('.o_field_x2many_list_row_add a'));
+        assert.strictEqual(form.$('input[name="foo"]').val(), "");
+
+        await testUtils.fields.editInput(form.$('input[name="foo"]'), "test"); // set value for foo
+        await testUtils.fields.editInput(form.$('input[name="foo"]'), ""); // remove value for foo
+
+        // trigger the onchange by setting a product
+        await testUtils.fields.many2one.clickOpenDropdown('product_id');
+        await testUtils.fields.many2one.clickHighlightedItem('product_id');
+        assert.strictEqual(form.$('input[name="foo"]').val(), 'onchange value',
+            'input should contain correct value after onchange');
+
+        form.destroy();
+    });
+
     QUnit.module('UrlWidget');
 
     QUnit.test('url widget in form view', async function (assert) {