diff --git a/plugins/woocommerce-admin/client/customize-store/assembler-hub/resizable-frame.jsx b/plugins/woocommerce-admin/client/customize-store/assembler-hub/resizable-frame.jsx
index a5a61fa0b45..8b682b07725 100644
--- a/plugins/woocommerce-admin/client/customize-store/assembler-hub/resizable-frame.jsx
+++ b/plugins/woocommerce-admin/client/customize-store/assembler-hub/resizable-frame.jsx
@@ -271,7 +271,7 @@ function ResizableFrame( {
 				right: HANDLE_STYLES_OVERRIDE,
 			} }
 			minWidth={ FRAME_MIN_WIDTH }
-			maxWidth={ isFullWidth ? '100%' : '150%' }
+			maxWidth={ '100%' }
 			maxHeight={ '100%' }
 			onFocus={ () => setShouldShowHandle( true ) }
 			onBlur={ () => setShouldShowHandle( false ) }
diff --git a/plugins/woocommerce/changelog/fix-cys-frame-overlay-sidebar b/plugins/woocommerce/changelog/fix-cys-frame-overlay-sidebar
new file mode 100644
index 00000000000..7898822a18a
--- /dev/null
+++ b/plugins/woocommerce/changelog/fix-cys-frame-overlay-sidebar
@@ -0,0 +1,4 @@
+Significance: patch
+Type: fix
+
+Fix cys frame overlap the sidebar