fix

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

@@ -217,6 +217,11 @@ export class Batch {
 				reset_branch(e, t);
 			}
 		} else {
+			// If sources are written to, then work needs to happen in a separate batch, else prior sources would be mixed with
+			// newly updated sources, which could lead to infinite loops when effects run over and over again.
+			previous_batch = this;
+			current_batch = null;
+
 			// append/remove branches
 			for (const fn of this.#commit_callbacks) fn(this);
 			this.#commit_callbacks.clear();
@@ -225,11 +230,6 @@ export class Batch {
 				this.#commit();
 			}
 
-			// If sources are written to, then work needs to happen in a separate batch, else prior sources would be mixed with
-			// newly updated sources, which could lead to infinite loops when effects run over and over again.
-			previous_batch = this;
-			current_batch = null;
-
 			flush_queued_effects(render_effects);
 			flush_queued_effects(effects);
 
@@ -369,6 +369,7 @@ export class Batch {
 		if (batches.size > 1) {
 			this.previous.clear();
 
+			var previous_batch = current_batch;
 			var previous_batch_values = batch_values;
 			var is_earlier = true;
 
@@ -432,7 +433,7 @@ export class Batch {
 				}
 			}
 
-			current_batch = null;
+			current_batch = previous_batch;
 			batch_values = previous_batch_values;
 		}