diff --git a/packages/editor-ui/src/components/FixedCollectionParameter.vue b/packages/editor-ui/src/components/FixedCollectionParameter.vue
index 9588e51a80..2d10f5b3ad 100644
--- a/packages/editor-ui/src/components/FixedCollectionParameter.vue
+++ b/packages/editor-ui/src/components/FixedCollectionParameter.vue
@@ -177,7 +177,11 @@ export default mixins(genericHelpers)
 					} else if (optionParameter.typeOptions !== undefined && optionParameter.typeOptions.multipleValues === true) {
 						// Multiple values are allowed so append option to array
 						newParameterValue[optionParameter.name] = get(this.nodeValues, `${this.path}.${optionParameter.name}`, []);
-						(newParameterValue[optionParameter.name] as INodeParameters[]).push(JSON.parse(JSON.stringify(optionParameter.default)));
+						if (Array.isArray(optionParameter.default)) {
+							(newParameterValue[optionParameter.name] as INodeParameters[]).push(...JSON.parse(JSON.stringify(optionParameter.default)));
+						} else if (optionParameter.default !== '' && typeof optionParameter.default !== 'object') {
+							(newParameterValue[optionParameter.name] as INodeParameters[]).push(JSON.parse(JSON.stringify(optionParameter.default)));
+						}
 					} else {
 						// Add a new option
 						newParameterValue[optionParameter.name] = JSON.parse(JSON.stringify(optionParameter.default));
diff --git a/packages/workflow/src/NodeHelpers.ts b/packages/workflow/src/NodeHelpers.ts
index 0a86250e2a..018ea8c4b6 100644
--- a/packages/workflow/src/NodeHelpers.ts
+++ b/packages/workflow/src/NodeHelpers.ts
@@ -613,7 +613,13 @@ export function getNodeParameters(nodePropertiesArray: INodeProperties[], nodeVa
 					nodeParameters[nodeProperties.name] = nodeValues[nodeProperties.name];
 				} else if (returnDefaults === true) {
 					// Does not have values defined but defaults should be returned
-					nodeParameters[nodeProperties.name] = JSON.parse(JSON.stringify(nodeProperties.default));
+					if (Array.isArray(nodeProperties.default)) {
+						nodeParameters[nodeProperties.name] = JSON.parse(JSON.stringify(nodeProperties.default));
+					} else {
+						// As it is probably wrong for many nodes, do we keep on returning an empty array if
+						// anything else than an array is set as default
+						nodeParameters[nodeProperties.name] = [];
+					}
 				}
 				nodeParametersFull[nodeProperties.name] = nodeParameters[nodeProperties.name];
 			} else {