diff --git a/Libraries/LibWeb/Animations/Animation.cpp b/Libraries/LibWeb/Animations/Animation.cpp
index 8f69d371c93..75caac5b52e 100644
--- a/Libraries/LibWeb/Animations/Animation.cpp
+++ b/Libraries/LibWeb/Animations/Animation.cpp
@@ -1,5 +1,6 @@
 /*
  * Copyright (c) 2023-2024, Matthew Olsson <mattco@serenityos.org>.
+ * Copyright (c) 2025, Jelle Raaijmakers <jelle@ladybird.org>
  *
  * SPDX-License-Identifier: BSD-2-Clause
  */
@@ -934,7 +935,9 @@ GC::Ptr<DOM::Document> Animation::document_for_timing() const
 
 void Animation::notify_timeline_time_did_change()
 {
-    update_finished_state(DidSeek::No, SynchronouslyNotify::Yes);
+    // Update finished state if not already finished; prevents recurring invalidation when the timeline updates.
+    if (!m_is_finished)
+        update_finished_state(DidSeek::No, SynchronouslyNotify::Yes);
 
     // Act on the pending play or pause task
     if (m_pending_play_task == TaskState::Scheduled) {
@@ -1330,13 +1333,11 @@ GC::Ref<WebIDL::Promise> Animation::current_finished_promise() const
 
 void Animation::invalidate_effect()
 {
-    if (!m_effect) {
+    if (!m_effect)
         return;
-    }
 
-    if (auto* target = m_effect->target(); target) {
+    if (auto* target = m_effect->target())
         target->document().set_needs_animated_style_update();
-    }
 }
 
 Animation::Animation(JS::Realm& realm)
diff --git a/Libraries/LibWeb/DOM/Document.cpp b/Libraries/LibWeb/DOM/Document.cpp
index f02077a11d8..d9d6ec2a425 100644
--- a/Libraries/LibWeb/DOM/Document.cpp
+++ b/Libraries/LibWeb/DOM/Document.cpp
@@ -1574,11 +1574,10 @@ void Document::update_animated_style_if_needed()
 
     for (auto& timeline : m_associated_animation_timelines) {
         for (auto& animation : timeline->associated_animations()) {
-            if (animation->is_idle() || animation->is_finished())
+            if (animation->is_idle())
                 continue;
-            if (auto effect = animation->effect()) {
+            if (auto effect = animation->effect())
                 effect->update_computed_properties(context);
-            }
         }
     }
 
diff --git a/Tests/LibWeb/Text/expected/wpt-import/css/css-transitions/transitioncancel-003.txt b/Tests/LibWeb/Text/expected/wpt-import/css/css-transitions/transitioncancel-003.txt
index 93cbe377682..cbb9ab615dd 100644
--- a/Tests/LibWeb/Text/expected/wpt-import/css/css-transitions/transitioncancel-003.txt
+++ b/Tests/LibWeb/Text/expected/wpt-import/css/css-transitions/transitioncancel-003.txt
@@ -2,5 +2,5 @@ Harness status: OK
 
 Found 1 tests
 
-1 Fail
-Fail	Mid-transition transition changes affect subsequent transitions
\ No newline at end of file
+1 Pass
+Pass	Mid-transition transition changes affect subsequent transitions
\ No newline at end of file