diff --git a/lib/compat/wordpress-6.5/interactivity-api/interactivity-api.php b/lib/compat/wordpress-6.5/interactivity-api/interactivity-api.php
index e532fe24447132..c4c0ac37519f41 100644
--- a/lib/compat/wordpress-6.5/interactivity-api/interactivity-api.php
+++ b/lib/compat/wordpress-6.5/interactivity-api/interactivity-api.php
@@ -58,16 +58,20 @@ function wp_interactivity_process_directives_of_interactive_blocks( array $parse
 				};
 
 				/*
-				* Uses a priority of 20 to ensure that other filters can add additional
-				* directives before the processing starts.
-				*/
-				add_filter( 'render_block_' . $block_name, $process_interactive_blocks, 20, 2 );
+				 * Uses a priority of 100 to ensure that other filters can add additional
+				 * directives before the processing starts.
+				 */
+				add_filter( 'render_block_' . $block_name, $process_interactive_blocks, 100, 2 );
 			}
 		}
 
 		return $parsed_block;
 	}
-	add_filter( 'render_block_data', 'wp_interactivity_process_directives_of_interactive_blocks' );
+	/*
+	 * Uses a priority of 100 to ensure that other filters can edit $parsed_block
+	 * without crashing the SSR.
+	 */
+	add_filter( 'render_block_data', 'wp_interactivity_process_directives_of_interactive_blocks', 100, 1 );
 }
 
 if ( ! function_exists( 'wp_interactivity' ) ) {
diff --git a/packages/e2e-tests/plugins/interactive-blocks.php b/packages/e2e-tests/plugins/interactive-blocks.php
index 0d35cc827d6da3..ab2f85156e3b3e 100644
--- a/packages/e2e-tests/plugins/interactive-blocks.php
+++ b/packages/e2e-tests/plugins/interactive-blocks.php
@@ -31,7 +31,8 @@ function () {
 			// But remove the server directive processing.
 			remove_filter(
 				'render_block_data',
-				'wp_interactivity_process_directives_of_interactive_blocks'
+				'wp_interactivity_process_directives_of_interactive_blocks',
+				100
 			);
 		}
 	}