diff --git a/packages/admin/src/components/bindingFacade/richText/baseEditor/createEditorWithEssentials.tsx b/packages/admin/src/components/bindingFacade/richText/baseEditor/createEditorWithEssentials.tsx
index 1925b85c6..8408af732 100644
--- a/packages/admin/src/components/bindingFacade/richText/baseEditor/createEditorWithEssentials.tsx
+++ b/packages/admin/src/components/bindingFacade/richText/baseEditor/createEditorWithEssentials.tsx
@@ -1,4 +1,4 @@
-import { createElement, ReactElement } from 'react'
+import { createElement, isValidElement, ReactElement } from 'react'
 import {
 	createEditor,
 	Descendant,
@@ -134,7 +134,7 @@ export const createEditorWithEssentials = (defaultElementType: string): Editor =
 				if (props.leaf[mark.type] === true) {
 					const markerEl = mark.render({ ...props, children: el })
 					if (markerEl !== null) {
-						if (!React.isValidElement(markerEl)) {
+						if (!isValidElement(markerEl)) {
 							throw new Error(`Mark plugin ${mark.type} returned a non-React element`)
 						}
 						el = markerEl
diff --git a/packages/react-richtext-renderer/src/hooks/useRichTextBlocksSource.ts b/packages/react-richtext-renderer/src/hooks/useRichTextBlocksSource.ts
index 35708819b..b40108a6f 100644
--- a/packages/react-richtext-renderer/src/hooks/useRichTextBlocksSource.ts
+++ b/packages/react-richtext-renderer/src/hooks/useRichTextBlocksSource.ts
@@ -6,9 +6,9 @@ import { RichTextRendererError } from '../RichTextRendererError'
 export const useRichTextBlocksSource = <CustomElements extends RichTextElement, CustomLeaves extends RichTextLeaf>({
 	deserialize = defaultDeserialize,
 	blocks,
-	referencesField = 'references',
-	sourceField = 'source',
-	referenceDiscriminationField = 'type',
+	referencesField,
+	sourceField,
+	referenceDiscriminationField,
 }: RichTextBlockSource<CustomElements, CustomLeaves>) => {
 	return useMemo((): RichTextBlock<CustomElements, CustomLeaves>[] => {
 		const sourceFieldResolved = sourceField ?? 'source'
@@ -16,7 +16,7 @@ export const useRichTextBlocksSource = <CustomElements extends RichTextElement,
 		const referenceDiscriminationFieldResolved = referenceDiscriminationField ?? 'type'
 
 		return blocks.map(block => {
-			if (!(sourceField in block)) {
+			if (!(sourceFieldResolved in block)) {
 				throw new RichTextRendererError(
 					`Found a block without a '${sourceFieldResolved}' field. ` +
 					(sourceField === undefined