simpler fix

packages/svelte/src/internal/client/dom/blocks/boundary.js

@@ -259,14 +259,6 @@ export class Boundary {
 				this.#anchor.before(this.#offscreen_fragment);
 				this.#offscreen_fragment = null;
 			}
-
-			const batch = current_batch;
-
-			if (batch) {
-				queue_micro_task(() => {
-					batch.flush();
-				});
-			}
 		}
 	}
 

packages/svelte/src/internal/client/reactivity/batch.js

@@ -685,7 +685,7 @@ export function suspend() {
 			batch.activate();
 			batch.decrement();
 		} else {
-			batch.deactivate();
+			batch.flush();
 		}
 
 		unset_context();