RTC: Fix 'networkidle' and other e2e tests that are flaky

test/e2e/specs/editor/various/post-editor-template-mode.spec.js

@@ -253,12 +253,14 @@ class PostEditorTemplateMode {
 			)
 		).toBeVisible();
 
-		// Wait for the editor to be loaded and ready before making changes.
-		// Without this, the editor will move focus to body while still typing.
-		// And the save states will not be counted as dirty.
-		// There is likely a bug in the code, waiting for the snackbar above should be enough.
-		// eslint-disable-next-line playwright/no-networkidle
-		await this.page.waitForLoadState( 'networkidle' );
+		// Wait for the editor to be fully loaded and ready before making changes.
+		// Without this, the editor may move focus to body while still typing,
+		// and save states will not be counted as dirty.
+		await this.page.waitForFunction(
+			() =>
+				window.wp?.data?.select( 'core/block-editor' )?.getBlocks()
+					?.length > 0
+		);
 	}
 
 	async saveTemplateWithoutPublishing() {

test/e2e/specs/site-editor/site-editor-url-navigation.spec.js

@@ -44,14 +44,11 @@ test.describe( 'Site editor url navigation', () => {
 		await admin.visitSiteEditor();
 		await page.click( 'role=button[name="Templates"]' );
 		await page.click( 'role=button[name="Add Template"i]' );
-		// Wait for network idle to avoid flaky tests.
-		// eslint-disable-next-line playwright/no-networkidle
-		await page.waitForLoadState( 'networkidle' );
-		await page
-			.getByRole( 'button', {
-				name: 'Single item: Post',
-			} )
-			.click();
+		const singleItemPost = page.getByRole( 'button', {
+			name: 'Single item: Post',
+		} );
+		await expect( singleItemPost ).toBeEnabled();
+		await singleItemPost.click();
 		await page
 			.getByRole( 'button', { name: 'For a specific item' } )
 			.click();