From ea978e4471f130d58d76b543e3e75e4999c27313 Mon Sep 17 00:00:00 2001
From: "Silc Lizard (Tokage) Renew"
 <61938263+TokageItLab@users.noreply.github.com>
Date: Thu, 1 Jan 2026 04:29:35 +0900
Subject: [PATCH] Fix AnimationPlayerEditor failed to fetch AnimationTree's
 libraries

---
 editor/animation/animation_player_editor_plugin.cpp | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/editor/animation/animation_player_editor_plugin.cpp b/editor/animation/animation_player_editor_plugin.cpp
index e09223b5b8d..5c4df16f2f8 100644
--- a/editor/animation/animation_player_editor_plugin.cpp
+++ b/editor/animation/animation_player_editor_plugin.cpp
@@ -2440,6 +2440,13 @@ void AnimationPlayerEditorPlugin::_update_dummy_player(AnimationMixer *p_mixer)
 	}
 	memdelete(default_node);
 
+	// Library list is dynamically added to property list, should be copied explicitly.
+	List<StringName> libraries;
+	p_mixer->get_animation_library_list(&libraries);
+	for (const StringName &K : libraries) {
+		dummy_player->add_animation_library(K, p_mixer->get_animation_library(K));
+	}
+
 	if (anim_editor) {
 		anim_editor->_update_player();
 	}