From 0b3a5e7cc4d6ba5bcc5105f694a59f721ee06fc5 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?M=C3=A1rk=20Tolm=C3=A1cs?= <mark@lazycat.hu>
Date: Tue, 24 Feb 2026 13:32:44 +0100
Subject: [PATCH] fix: Multi-point arrow bound point update (#10831)

Signed-off-by: Mark Tolmacs <mark@lazycat.hu>
---
 packages/element/src/binding.ts | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/packages/element/src/binding.ts b/packages/element/src/binding.ts
index ae84623c3b..bf1eeb63c7 100644
--- a/packages/element/src/binding.ts
+++ b/packages/element/src/binding.ts
@@ -1776,10 +1776,13 @@ export const updateBoundPoint = (
     );
   const otherArrowPoint = LinearElementEditor.getPointAtIndexGlobalCoordinates(
     arrow,
-    startOrEnd === "startBinding" ? -1 : 0,
+    startOrEnd === "startBinding" ? 1 : -2,
     elementsMap,
   );
-  const otherFocusPointOrArrowPoint = otherFocusPoint || otherArrowPoint;
+  const otherFocusPointOrArrowPoint =
+    arrow.points.length === 2
+      ? otherFocusPoint || otherArrowPoint
+      : otherArrowPoint;
   const intersector =
     otherFocusPointOrArrowPoint &&
     lineSegment(focusPoint, otherFocusPointOrArrowPoint);