diff --git a/src/Umbraco.Core/PropertyEditors/Validators/MultipleValueValidator.cs b/src/Umbraco.Core/PropertyEditors/Validators/MultipleValueValidator.cs
index ed1d11ad18..9cde751afc 100644
--- a/src/Umbraco.Core/PropertyEditors/Validators/MultipleValueValidator.cs
+++ b/src/Umbraco.Core/PropertyEditors/Validators/MultipleValueValidator.cs
@@ -48,7 +48,7 @@ public class MultipleValueValidator : IValueValidator
         }
 
         var invalidValues = values
-            .Where(x => valueListConfiguration.Items.Contains(x) is false)
+            .Where(x => x.IsNullOrWhiteSpace() is false && valueListConfiguration.Items.Contains(x) is false)
             .ToList();
 
         if (invalidValues.Count == 1)
diff --git a/src/Umbraco.Web.UI.Client/src/packages/property-editors/dropdown/property-editor-ui-dropdown.element.ts b/src/Umbraco.Web.UI.Client/src/packages/property-editors/dropdown/property-editor-ui-dropdown.element.ts
index e077081df6..5622585166 100644
--- a/src/Umbraco.Web.UI.Client/src/packages/property-editors/dropdown/property-editor-ui-dropdown.element.ts
+++ b/src/Umbraco.Web.UI.Client/src/packages/property-editors/dropdown/property-editor-ui-dropdown.element.ts
@@ -78,7 +78,7 @@ export class UmbPropertyEditorUIDropdownElement
 
 			// If selection includes a value that is not in the list, add it to the list
 			this.#selection.forEach((value) => {
-				if (!this._options.find((item) => item.value === value)) {
+				if (value !== '' && !this._options.find((item) => item.value === value)) {
 					this._options.push({
 						name: `${value} (${this.localize.term('validation_legacyOption')})`,
 						value,
@@ -109,7 +109,7 @@ export class UmbPropertyEditorUIDropdownElement
 		this.#setValue(value ? [value] : []);
 	}
 
-	#onChangeMulitple(event: Event & { target: HTMLSelectElement }) {
+	#onChangeMultiple(event: Event & { target: HTMLSelectElement }) {
 		const selected = event.target.selectedOptions;
 		const value = selected ? Array.from(selected).map((option) => option.value) : [];
 		this.#setValue(value);
@@ -155,7 +155,7 @@ export class UmbPropertyEditorUIDropdownElement
 		}
 
 		return html`
-			<select id="native" multiple ?required=${this.mandatory} @change=${this.#onChangeMulitple}>
+			<select id="native" multiple ?required=${this.mandatory} @change=${this.#onChangeMultiple}>
 				${map(
 					this._options,
 					(item) => html`<option value=${item.value} ?selected=${item.selected}>${item.name}</option>`,
diff --git a/tests/Umbraco.Tests.UnitTests/Umbraco.Core/PropertyEditors/MultiValuePropertyEditorTests.cs b/tests/Umbraco.Tests.UnitTests/Umbraco.Core/PropertyEditors/MultiValuePropertyEditorTests.cs
index 599a047c16..b1f4f76085 100644
--- a/tests/Umbraco.Tests.UnitTests/Umbraco.Core/PropertyEditors/MultiValuePropertyEditorTests.cs
+++ b/tests/Umbraco.Tests.UnitTests/Umbraco.Core/PropertyEditors/MultiValuePropertyEditorTests.cs
@@ -128,6 +128,7 @@ public class MultiValuePropertyEditorTests
         Assert.AreEqual("Item 3", result.Items[2]);
     }
 
+    [TestCase("", true, "")]
     [TestCase("Red", true, "")]
     [TestCase("Yellow", false, "notOneOfOptions")]
     [TestCase("Red,Green", true, "")]