diff --git a/cypress/e2e/48-subworkflow-inputs.cy.ts b/cypress/e2e/48-subworkflow-inputs.cy.ts
index 716d253b8c..bde27c9770 100644
--- a/cypress/e2e/48-subworkflow-inputs.cy.ts
+++ b/cypress/e2e/48-subworkflow-inputs.cy.ts
@@ -55,13 +55,16 @@ describe('Sub-workflow creation and typed usage', () => {
 
 		openNode('Execute Workflow');
 
+		let openedUrl = '';
+
 		// Prevent sub-workflow from opening in new window
 		cy.window().then((win) => {
 			cy.stub(win, 'open').callsFake((url) => {
-				cy.visit(url);
+				openedUrl = url;
 			});
 		});
 		selectResourceLocatorItem('workflowId', 0, 'Create a');
+		cy.then(() => cy.visit(openedUrl));
 		// **************************
 		// NAVIGATE TO CHILD WORKFLOW
 		// **************************
diff --git a/packages/frontend/editor-ui/src/components/ResourceMapper/ResourceMapper.vue b/packages/frontend/editor-ui/src/components/ResourceMapper/ResourceMapper.vue
index e4f4caed3f..eae8c2ae0c 100644
--- a/packages/frontend/editor-ui/src/components/ResourceMapper/ResourceMapper.vue
+++ b/packages/frontend/editor-ui/src/components/ResourceMapper/ResourceMapper.vue
@@ -13,7 +13,7 @@ import type {
 	ResourceMapperFields,
 	ResourceMapperValue,
 } from 'n8n-workflow';
-import { NodeHelpers } from 'n8n-workflow';
+import { deepCopy, NodeHelpers } from 'n8n-workflow';
 import { computed, onMounted, reactive, watch } from 'vue';
 import MappingModeSelect from './MappingModeSelect.vue';
 import MatchingColumnsSelect from './MatchingColumnsSelect.vue';
@@ -537,7 +537,9 @@ function emitValueChanged(): void {
 	pruneParamValues();
 	emit('valueChanged', {
 		name: `${props.path}`,
-		value: state.paramValue,
+		// deepCopy ensures that mutations to state.paramValue that occur in
+		// this component are never visible to the store without explicit event emits
+		value: deepCopy(state.paramValue),
 		node: props.node?.name,
 	});
 	updateNodeIssues();
diff --git a/packages/frontend/editor-ui/src/stores/workflows.store.test.ts b/packages/frontend/editor-ui/src/stores/workflows.store.test.ts
index edd8273a18..584fac988d 100644
--- a/packages/frontend/editor-ui/src/stores/workflows.store.test.ts
+++ b/packages/frontend/editor-ui/src/stores/workflows.store.test.ts
@@ -31,6 +31,7 @@ import * as apiUtils from '@/utils/apiUtils';
 import { useSettingsStore } from '@/stores/settings.store';
 import { useLocalStorage } from '@vueuse/core';
 import { ref } from 'vue';
+import { createTestNode } from '@/__tests__/mocks';
 
 vi.mock('@/stores/ndv.store', () => ({
 	useNDVStore: vi.fn(() => ({
@@ -1041,6 +1042,36 @@ describe('useWorkflowsStore', () => {
 		});
 	});
 
+	describe('setNodeParameters', () => {
+		beforeEach(() => {
+			workflowsStore.setNodes([createTestNode({ name: 'a', parameters: { p: 1, q: true } })]);
+		});
+
+		it('should set node parameters', () => {
+			expect(workflowsStore.nodesByName.a.parameters).toEqual({ p: 1, q: true });
+
+			workflowsStore.setNodeParameters({ name: 'a', value: { q: false, r: 's' } });
+
+			expect(workflowsStore.nodesByName.a.parameters).toEqual({ q: false, r: 's' });
+		});
+
+		it('should set node parameters preserving existing ones if append=true', () => {
+			expect(workflowsStore.nodesByName.a.parameters).toEqual({ p: 1, q: true });
+
+			workflowsStore.setNodeParameters({ name: 'a', value: { q: false, r: 's' } }, true);
+
+			expect(workflowsStore.nodesByName.a.parameters).toEqual({ p: 1, q: false, r: 's' });
+		});
+
+		it('should not update last parameter update time if parameters are set to the same value', () => {
+			expect(workflowsStore.getParametersLastUpdate('a')).toEqual(undefined);
+
+			workflowsStore.setNodeParameters({ name: 'a', value: { p: 1, q: true } });
+
+			expect(workflowsStore.getParametersLastUpdate('a')).toEqual(undefined);
+		});
+	});
+
 	describe('renameNodeSelectedAndExecution', () => {
 		it('should rename node and update execution data', () => {
 			const nodeName = 'Rename me';
diff --git a/packages/frontend/editor-ui/src/stores/workflows.store.ts b/packages/frontend/editor-ui/src/stores/workflows.store.ts
index 3ae30e29ea..87a4ffc33f 100644
--- a/packages/frontend/editor-ui/src/stores/workflows.store.ts
+++ b/packages/frontend/editor-ui/src/stores/workflows.store.ts
@@ -1290,12 +1290,12 @@ export const useWorkflowsStore = defineStore(STORES.WORKFLOWS, () => {
 		return false;
 	}
 
-	function setNodeIssue(nodeIssueData: INodeIssueData): boolean {
+	function setNodeIssue(nodeIssueData: INodeIssueData): void {
 		const nodeIndex = workflow.value.nodes.findIndex((node) => {
 			return node.name === nodeIssueData.node;
 		});
 		if (nodeIndex === -1) {
-			return false;
+			return;
 		}
 
 		const node = workflow.value.nodes[nodeIndex];
@@ -1304,7 +1304,7 @@ export const useWorkflowsStore = defineStore(STORES.WORKFLOWS, () => {
 			// Remove the value if one exists
 			if (node.issues?.[nodeIssueData.type] === undefined) {
 				// No values for type exist so nothing has to get removed
-				return true;
+				return;
 			}
 
 			const { [nodeIssueData.type]: removedNodeIssue, ...remainingNodeIssues } = node.issues;
@@ -1319,7 +1319,6 @@ export const useWorkflowsStore = defineStore(STORES.WORKFLOWS, () => {
 				},
 			});
 		}
-		return true;
 	}
 
 	function addNode(nodeData: INodeUi): void {
@@ -1390,12 +1389,14 @@ export const useWorkflowsStore = defineStore(STORES.WORKFLOWS, () => {
 
 		if (nodeIndex !== -1) {
 			for (const key of Object.keys(updateInformation.properties)) {
-				uiStore.stateIsDirty = true;
-
 				const typedKey = key as keyof INodeUpdatePropertiesInformation['properties'];
 				const property = updateInformation.properties[typedKey];
 
-				updateNodeAtIndex(nodeIndex, { [key]: property });
+				const changed = updateNodeAtIndex(nodeIndex, { [key]: property });
+
+				if (changed) {
+					uiStore.stateIsDirty = true;
+				}
 			}
 		}
 	}
@@ -1420,7 +1421,7 @@ export const useWorkflowsStore = defineStore(STORES.WORKFLOWS, () => {
 
 		const excludeKeys = ['position', 'notes', 'notesInFlow'];
 
-		if (!excludeKeys.includes(updateInformation.key)) {
+		if (changed && !excludeKeys.includes(updateInformation.key)) {
 			nodeMetadata.value[workflow.value.nodes[nodeIndex].name].parametersLastUpdatedAt = Date.now();
 		}
 	}
@@ -1439,17 +1440,19 @@ export const useWorkflowsStore = defineStore(STORES.WORKFLOWS, () => {
 
 		const node = workflow.value.nodes[nodeIndex];
 
-		uiStore.stateIsDirty = true;
 		const newParameters =
 			!!append && isObject(updateInformation.value)
 				? { ...node.parameters, ...updateInformation.value }
 				: updateInformation.value;
 
-		updateNodeAtIndex(nodeIndex, {
+		const changed = updateNodeAtIndex(nodeIndex, {
 			parameters: newParameters as INodeParameters,
 		});
 
-		nodeMetadata.value[node.name].parametersLastUpdatedAt = Date.now();
+		if (changed) {
+			uiStore.stateIsDirty = true;
+			nodeMetadata.value[node.name].parametersLastUpdatedAt = Date.now();
+		}
 	}
 
 	function setLastNodeParameters(updateInformation: IUpdateInformation): void {