Revert "Edit Post: Remove unnecessary effect in InitPatternModal (Wor…

…dPress#65734)"

This reverts commit 6772238.

packages/edit-post/src/components/init-pattern-modal/index.js

@@ -11,11 +11,12 @@ import {
 	ToggleControl,
 	TextControl,
 } from '@wordpress/components';
-import { useState } from '@wordpress/element';
+import { useEffect, useState } from '@wordpress/element';
 import { store as editorStore } from '@wordpress/editor';
 
 export default function InitPatternModal() {
 	const { editPost } = useDispatch( editorStore );
+	const [ isModalOpen, setIsModalOpen ] = useState( false );
 	const [ syncType, setSyncType ] = useState( undefined );
 	const [ title, setTitle ] = useState( '' );
 
@@ -27,9 +28,14 @@ export default function InitPatternModal() {
 			isNewPost: isCleanNewPost(),
 		};
 	}, [] );
-	const [ isModalOpen, setIsModalOpen ] = useState( () =>
-		isNewPost && postType === 'wp_block' ? true : false
-	);
+
+	useEffect( () => {
+		if ( isNewPost && postType === 'wp_block' ) {
+			setIsModalOpen( true );
+		}
+		// We only want the modal to open when the page is first loaded.
+		// eslint-disable-next-line react-hooks/exhaustive-deps
+	}, [] );
 
 	if ( postType !== 'wp_block' || ! isNewPost ) {
 		return null;