diff --git a/client/src/components/Workflow/Run/WorkflowRun.vue b/client/src/components/Workflow/Run/WorkflowRun.vue
index 7322da10127..08f03f9eec7 100644
--- a/client/src/components/Workflow/Run/WorkflowRun.vue
+++ b/client/src/components/Workflow/Run/WorkflowRun.vue
@@ -50,6 +50,7 @@ const hasUpgradeMessages = ref(false);
 const hasStepVersionChanges = ref(false);
 const invocations = ref([]);
 const simpleForm = ref(false);
+const disableSimpleForm = ref(false);
 const submissionError = ref("");
 const workflowError = ref("");
 const workflowName = ref("");
@@ -109,6 +110,7 @@ async function loadRun() {
             if (incomingModel.hasReplacementParametersInToolForm) {
                 console.log("cannot render simple workflow form - has ${} values in tool steps");
                 simpleForm.value = false;
+                disableSimpleForm.value = true;
             }
             // If there are required parameters in a tool form (a disconnected runtime
             // input), we have to render the tool form steps and cannot use the
@@ -116,12 +118,14 @@ async function loadRun() {
             if (incomingModel.hasOpenToolSteps) {
                 console.log("cannot render simple workflow form - one or more tools have disconnected runtime inputs");
                 simpleForm.value = false;
+                disableSimpleForm.value = true;
             }
             // Just render the whole form for resource request parameters (kind of
             // niche - I'm not sure anyone is using these currently anyway).
             if (incomingModel.hasWorkflowResourceParameters) {
                 console.log(`Cannot render simple workflow form - workflow resource parameters are configured`);
                 simpleForm.value = false;
+                disableSimpleForm.value = true;
             }
         }
 
@@ -247,6 +251,7 @@ defineExpose({
                         v-else
                         :model="workflowModel"
                         :can-mutate-current-history="canRunOnHistory"
+                        :disable-simple-form="disableSimpleForm"
                         @submissionSuccess="handleInvocations"
                         @submissionError="handleSubmissionError"
                         @showSimple="advancedForm = false" />
diff --git a/client/src/components/Workflow/Run/WorkflowRunForm.vue b/client/src/components/Workflow/Run/WorkflowRunForm.vue
index 261f2eede97..bfca309ac00 100644
--- a/client/src/components/Workflow/Run/WorkflowRunForm.vue
+++ b/client/src/components/Workflow/Run/WorkflowRunForm.vue
@@ -10,6 +10,7 @@
             <b>Workflow: {{ model.name }}</b> <i>(version: {{ model.runData.version + 1 }})</i>
             <div class="float-right d-flex flex-gapx-1">
                 <b-button
+                    v-if="!disableSimpleForm"
                     v-b-tooltip.hover.noninteractive
                     variant="link"
                     class="text-decoration-none"
@@ -104,6 +105,10 @@ export default {
             type: Boolean,
             required: true,
         },
+        disableSimpleForm: {
+            type: Boolean,
+            default: false,
+        },
     },
     data() {
         return {
diff --git a/client/src/composables/useWorkflowRunGraph.ts b/client/src/composables/useWorkflowRunGraph.ts
index 75357042060..f10b097cb38 100644
--- a/client/src/composables/useWorkflowRunGraph.ts
+++ b/client/src/composables/useWorkflowRunGraph.ts
@@ -86,7 +86,7 @@ export function useWorkflowRunGraph(
     /** The steps of the original workflow */
     const workflowSteps = computed<Record<string, Readonly<Step>>>(() => loadedWorkflow.value?.steps);
 
-    const steps = computed<Record<string, WorkflowRunStep>>(() => {
+    const steps = computed<Record<string, WorkflowRunStep | Readonly<Step>>>(() => {
         if (!workflowSteps.value || !formInputs.value || !inputs.value) {
             return {};
         }
@@ -103,6 +103,9 @@ export function useWorkflowRunGraph(
                     const dataInput = inputs.value[step.id.toString()];
                     const formInput = formInputs.value.find((input) => parseInt(input.name) === step.id);
                     stepInfo = getWorkflowRunStepInfo(formInput, dataInput);
+                } else {
+                    // not an input, so just the original step
+                    result[stepId] = step;
                 }
                 if (stepInfo) {
                     result[stepId] = { ...step, ...stepInfo };