diff --git a/plugins/woocommerce-admin/client/customize-store/assembler-hub/sidebar/pattern-screen/sidebar-pattern-screen.tsx b/plugins/woocommerce-admin/client/customize-store/assembler-hub/sidebar/pattern-screen/sidebar-pattern-screen.tsx
index 78d5f4a1346..8d2cc93a674 100644
--- a/plugins/woocommerce-admin/client/customize-store/assembler-hub/sidebar/pattern-screen/sidebar-pattern-screen.tsx
+++ b/plugins/woocommerce-admin/client/customize-store/assembler-hub/sidebar/pattern-screen/sidebar-pattern-screen.tsx
@@ -8,6 +8,7 @@ import {
 	useRef,
 	useState,
 } from '@wordpress/element';
+import { useAsyncList } from '@wordpress/compose';
 import { useSelect, useDispatch, select } from '@wordpress/data';
 import { BlockInstance, cloneBlock } from '@wordpress/blocks';
 import { close } from '@wordpress/icons';
@@ -108,6 +109,8 @@ export const SidebarPatternScreen = ( { category }: { category: string } ) => {
 		);
 	}, [ category, patterns ] );
 
+	const asyncSortedPatterns = useAsyncList( sortedPatterns );
+
 	const [ patternPagination, setPatternPagination ] = useState( 10 );
 
 	const refElement = useRef< HTMLDivElement >( null );
@@ -243,11 +246,11 @@ export const SidebarPatternScreen = ( { category }: { category: string } ) => {
 			) }
 			{ ! isSpinnerVisible && (
 				<BlockPatternList
-					shownPatterns={ sortedPatterns.slice(
+					shownPatterns={ asyncSortedPatterns.slice(
 						0,
 						patternPagination
 					) }
-					blockPatterns={ sortedPatterns.slice(
+					blockPatterns={ asyncSortedPatterns.slice(
 						0,
 						patternPagination
 					) }
diff --git a/plugins/woocommerce/changelog/49041-48680-cys-block-list-patterns-woo-patterns-preview-arent-rendered-correctly b/plugins/woocommerce/changelog/49041-48680-cys-block-list-patterns-woo-patterns-preview-arent-rendered-correctly
new file mode 100644
index 00000000000..11339c6d825
--- /dev/null
+++ b/plugins/woocommerce/changelog/49041-48680-cys-block-list-patterns-woo-patterns-preview-arent-rendered-correctly
@@ -0,0 +1,4 @@
+Significance: minor
+Type: fix
+
+CYS: Fix pattern rendering issues
\ No newline at end of file