holy shit it woooooorks

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

@@ -387,16 +387,7 @@ export class Batch {
 		batch_values = null;
 	}
 
-	flush() {
-		var source_stacks = DEV ? new Set() : null;
-
-		try {
-			is_processing = true;
-			current_batch = this;
-
-			// we only reschedule previously-deferred effects if we expect
-			// to be able to run them after processing the batch
-			if (!this.#is_deferred()) {
+	#revive() {
 		for (const e of this.#dirty_effects) {
 			this.#maybe_dirty_effects.delete(e);
 			set_signal_status(e, DIRTY);
@@ -409,6 +400,19 @@ export class Batch {
 		}
 	}
 
+	flush() {
+		var source_stacks = DEV ? new Set() : null;
+
+		try {
+			is_processing = true;
+			current_batch = this;
+
+			// we only reschedule previously-deferred effects if we expect
+			// to be able to run them after processing the batch
+			if (!this.#is_deferred()) {
+				this.#revive();
+			}
+
 			this.#process();
 		} finally {
 			flush_count = 0;
@@ -487,12 +491,23 @@ export class Batch {
 						batch.#traverse(root, [], []);
 					}
 
-					// TODO do we need to do anything with the dummy effect arrays?
+					batch.#roots.length = 0;
 				}
 
 				batch.deactivate();
 			}
 		}
+
+		for (const batch of batches) {
+			if (batch.#blockers.has(this)) {
+				batch.#blockers.delete(this);
+
+				if (batch.#blockers.size === 0 && !batch.#is_deferred()) {
+					batch.#revive();
+					batch.#process();
+				}
+			}
+		}
 	}
 
 	/**
@@ -562,8 +577,6 @@ export class Batch {
 	}
 
 	apply() {
-		this.#blockers.clear();
-
 		if (!async_mode_flag || (!this.is_fork && batches.size === 1)) {
 			batch_values = null;
 			return;