Fix disappearing content during interaction

editor/src/components/canvas/ui-jsx-canvas-renderer/ui-jsx-canvas-component-renderer.tsx

@@ -363,7 +363,7 @@ export function createComponentRendererComponent(params: {
           null,
         )
       }
-    } else if (shouldUpdate()) {
+    } else if (shouldUpdate() || buildResult.current === null) {
       buildResult.current = buildComponentRenderResult(utopiaJsxComponent.rootElement)
     }
     return buildResult.current

editor/src/core/workers/parser-printer/parser-printer-functional-components.spec.ts

@@ -103,6 +103,14 @@ export var whatever = ({prop, ...otherProps}) => {
 }
 `
 
+const codeWithDestructuredPropsObjectWithElementNamePropAndRestParam = `import React from "react";
+export var whatever = ({As = 'div', ...otherProps}) => {
+  return (
+    <As data-uid={'aaa'} />
+  )
+}
+`
+
 const codeWithDestructuredArray = `import React from "react";
 import { View } from "utopia-api";
 export var whatever = ([prop]) => {
@@ -1059,6 +1067,10 @@ describe('Parsing, printing, reparsing a function component with props', () => {
     testParsePrintParse(codeWithDestructuredPropsObjectWithRestParam)
   })
 
+  it('Correctly parses back and forth a destructured props object with element name prop and rest param', () => {
+    testParsePrintParse(codeWithDestructuredPropsObjectWithElementNamePropAndRestParam)
+  })
+
   it('Correctly parses back and forth a destructured props array', () => {
     testParsePrintParse(codeWithDestructuredArray)
   })

editor/src/core/workers/parser-printer/parser-printer-parsing.ts

@@ -114,6 +114,7 @@ import {
   jsAssignmentStatement,
   clearAssignmentUniqueIDsAndSourceMaps,
   clearJSExpressionOtherJavaScriptUniqueIDs,
+  propertiesExposedByParams,
 } from '../../shared/element-template'
 import { maybeToArray, forceNotNull } from '../../shared/optional-utils'
 import type {
@@ -4105,7 +4106,7 @@ export function parseOutFunctionContents(
         jsBlock = null
       }
 
-      let declared: Array<string> = [...topLevelNames]
+      let declared: Array<string> = [...topLevelNames, ...propertiesExposedByParams(params)]
       if (jsBlock != null) {
         declared.push(...jsBlock.definedWithin)
       }