diff --git a/.changeset/gorgeous-birds-brake.md b/.changeset/gorgeous-birds-brake.md
new file mode 100644
index 0000000000..8365cc0e6a
--- /dev/null
+++ b/.changeset/gorgeous-birds-brake.md
@@ -0,0 +1,5 @@
+---
+'svelte': patch
+---
+
+fix: associate sources in Spring/Tween/SvelteMap/SvelteSet with correct reaction