diff --git a/src/panels/config/automation/blueprint-automation-editor.ts b/src/panels/config/automation/blueprint-automation-editor.ts
index 43b0ccf681..3131a44b26 100644
--- a/src/panels/config/automation/blueprint-automation-editor.ts
+++ b/src/panels/config/automation/blueprint-automation-editor.ts
@@ -194,7 +194,14 @@ export class HaBlueprintAutomationEditor extends LitElement {
     }
     const input = { ...this.config.use_blueprint.input, [key]: value };
 
-    if (value === "" || value === undefined) {
+    const blueprint = this._blueprint;
+    const metaValue =
+      !blueprint || "error" in blueprint
+        ? undefined
+        : blueprint?.metadata.input && blueprint?.metadata?.input[key];
+    const keyDefault = metaValue && metaValue.default;
+
+    if ((value === "" && !keyDefault) || value === undefined) {
       delete input[key];
     }
 
diff --git a/src/panels/config/script/blueprint-script-editor.ts b/src/panels/config/script/blueprint-script-editor.ts
index d6057373af..453a639746 100644
--- a/src/panels/config/script/blueprint-script-editor.ts
+++ b/src/panels/config/script/blueprint-script-editor.ts
@@ -173,7 +173,14 @@ export class HaBlueprintScriptEditor extends LitElement {
     }
     const input = { ...this.config.use_blueprint.input, [key]: value };
 
-    if (value === "" || value === undefined) {
+    const blueprint = this._blueprint;
+    const metaValue =
+      !blueprint || "error" in blueprint
+        ? undefined
+        : blueprint?.metadata.input && blueprint?.metadata?.input[key];
+    const keyDefault = metaValue && metaValue.default;
+
+    if ((value === "" && !keyDefault) || value === undefined) {
       delete input[key];
     }