diff --git a/packages/oss-console/src/components/Launch/LaunchForm/MapInput.tsx b/packages/oss-console/src/components/Launch/LaunchForm/MapInput.tsx
index 00d47e1c6..e70edf516 100644
--- a/packages/oss-console/src/components/Launch/LaunchForm/MapInput.tsx
+++ b/packages/oss-console/src/components/Launch/LaunchForm/MapInput.tsx
@@ -109,7 +109,7 @@ const MapSingleInputItem = (props: MapInputItemProps) => {
   );
 };
 
-const getNewMapItem = (id, key = '', value = ''): MapInputItem => {
+const getNewMapItem = (id: number | null, key = '', value = ''): MapInputItem => {
   return { id, key, value };
 };
 
@@ -121,7 +121,11 @@ function parseMappedTypeValue(value?: InputValue): MapInputItem[] {
   try {
     const mapObj = JSON.parse(value.toString());
     if (typeof mapObj === 'object') {
-      return Object.keys(mapObj).map((key, index) => getNewMapItem(index, key, mapObj[key]));
+      return Object.keys(mapObj).map((key, index) => {
+        // Object values (e.g. Map[str, struct] on relaunch) must be JSON-stringified for the text field.
+        const itemValue = mapObj[key];
+        return getNewMapItem(index, key, typeof itemValue === 'object' ? JSON.stringify(itemValue) : itemValue);
+      });
     }
   } catch (e) {
     // do nothing
diff --git a/packages/oss-console/src/components/Launch/LaunchForm/test/MapInput.test.tsx b/packages/oss-console/src/components/Launch/LaunchForm/test/MapInput.test.tsx
new file mode 100644
index 000000000..13c7ac22b
--- /dev/null
+++ b/packages/oss-console/src/components/Launch/LaunchForm/test/MapInput.test.tsx
@@ -0,0 +1,50 @@
+import * as React from 'react';
+import { ThemeProvider } from '@mui/material/styles';
+import { render } from '@testing-library/react';
+import { muiTheme } from '@clients/theme/Theme/muiTheme';
+import { MapInput } from '../MapInput';
+import { InputProps, InputType } from '../types';
+
+const makeMapProps = (value: string): InputProps => ({
+  description: '',
+  name: 'mapInput',
+  label: 'Map Input',
+  required: false,
+  typeDefinition: {
+    literalType: {},
+    type: InputType.Map,
+    subtype: { literalType: {}, type: InputType.Struct },
+  },
+  value,
+  onChange: jest.fn(),
+});
+
+const renderMap = (value: string) =>
+  render(
+    <ThemeProvider theme={muiTheme}>
+      <MapInput {...makeMapProps(value)} />
+    </ThemeProvider>,
+  );
+
+describe('MapInput', () => {
+  it('renders an object map value as JSON (not "[object Object]") when relaunching', () => {
+    // A map whose values are themselves objects -- the shape a prior execution produces when
+    // relaunching (e.g. Map[str, struct]). Before the fix this binds an object straight into the
+    // value text field, which coerces to "[object Object]" (and produced render errors).
+    const { container } = renderMap('{"foo":{"nested":"bar"}}');
+
+    const keyField = container.querySelector('.keyControl input') as HTMLInputElement;
+    const valueField = container.querySelector('.valueControl textarea') as HTMLTextAreaElement;
+
+    expect(keyField?.value).toBe('foo');
+    expect(valueField).not.toBeNull();
+    expect(valueField.value).toBe('{"nested":"bar"}');
+    expect(valueField.value).not.toBe('[object Object]');
+  });
+
+  it('leaves plain string map values unchanged', () => {
+    const { container } = renderMap('{"foo":"bar"}');
+    const valueField = container.querySelector('.valueControl textarea') as HTMLTextAreaElement;
+    expect(valueField?.value).toBe('bar');
+  });
+});