Better fix

packages/svelte/src/internal/client/constants.js

@@ -21,7 +21,6 @@ export const INSPECT_EFFECT = 1 << 18;
 export const HEAD_EFFECT = 1 << 19;
 export const EFFECT_HAS_DERIVED = 1 << 20;
 export const EFFECT_IS_UPDATING = 1 << 21;
-export const TEMPLATE_EFFECT = 1 << 22;
 
 export const STATE_SYMBOL = Symbol('$state');
 export const LEGACY_PROPS = Symbol('legacy props');

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

@@ -32,8 +32,7 @@ import {
 	HEAD_EFFECT,
 	MAYBE_DIRTY,
 	EFFECT_HAS_DERIVED,
-	BOUNDARY_EFFECT,
-	TEMPLATE_EFFECT
+	BOUNDARY_EFFECT
 } from '#client/constants';
 import { set } from './sources.js';
 import * as e from '../errors.js';
@@ -345,12 +344,12 @@ export function template_effect(fn, thunks = [], d = derived) {
 			define_property(inner, 'name', { value: '{expression}' });
 
 			const deriveds = thunks.map(d);
-			block(inner, TEMPLATE_EFFECT);
+			block(inner);
 		});
 	}
 
 	const deriveds = thunks.map(d);
-	return block(() => fn(...deriveds.map(get)), TEMPLATE_EFFECT);
+	return block(() => fn(...deriveds.map(get)));
 }
 
 /**

packages/svelte/src/internal/client/runtime.js

@@ -22,8 +22,7 @@ import {
 	ROOT_EFFECT,
 	LEGACY_DERIVED_PROP,
 	DISCONNECTED,
-	EFFECT_IS_UPDATING,
-	TEMPLATE_EFFECT
+	EFFECT_IS_UPDATING
 } from './constants.js';
 import { flush_tasks } from './dom/task.js';
 import { internal_set, old_values } from './reactivity/sources.js';
@@ -204,8 +203,8 @@ export function check_dirtiness(reaction, resuming = false) {
 			for (i = 0; i < length; i++) {
 				dependency = dependencies[i];
 
-				if (check_dirtiness(/** @type {Derived} */ (dependency))) {
-					/* Don't execute deriveds of template effects when unpausing, for example when outer resumes
+				if (check_dirtiness(/** @type {Derived} */ (dependency), resuming)) {
+					/* Don't execute deriveds when unpausing, for example when outer resumes
 
 					{#if outer}
 					  {#if inner}
@@ -215,7 +214,7 @@ export function check_dirtiness(reaction, resuming = false) {
 
 					inner might be undefined, so don't eagerly execute `inner.func()`
 					 */
-					if (resuming && (reaction.f & TEMPLATE_EFFECT) !== 0) return true;
+					if (resuming) return true;
 					update_derived(/** @type {Derived} */ (dependency));
 				}