From fc8da53fba02d20b1b6d840a542bd8cdb224e537 Mon Sep 17 00:00:00 2001
From: ShadowCommander <10494922+ShadowCommander@users.noreply.github.com>
Date: Sun, 16 Jan 2022 12:21:08 -0800
Subject: [PATCH] Stops InteractionOutline when the mouse is off screen.
 (#6191)

---
 Content.Client/Outline/InteractionOutlineSystem.cs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Content.Client/Outline/InteractionOutlineSystem.cs b/Content.Client/Outline/InteractionOutlineSystem.cs
index 5cf24f177c..08b511e45b 100644
--- a/Content.Client/Outline/InteractionOutlineSystem.cs
+++ b/Content.Client/Outline/InteractionOutlineSystem.cs
@@ -52,7 +52,8 @@ public sealed class InteractionOutlineSystem : EntitySystem
 
         EntityUid? entityToClick = null;
         var renderScale = 1;
-        if (_uiManager.CurrentlyHovered is IViewportControl vp)
+        if (_uiManager.CurrentlyHovered is IViewportControl vp
+            && _inputManager.MouseScreenPosition.IsValid)
         {
             var mousePosWorld = vp.ScreenToMap(_inputManager.MouseScreenPosition.Position);
             entityToClick = screen.GetEntityUnderPosition(mousePosWorld);