Fix single-user BUIs erroneously closing (#28375)

diff --git a/Content.Shared/Interaction/SharedInteractionSystem.cs b/Content.Shared/Interaction/SharedInteractionSystem.cs
index 6f6777ee96485d7cc13e44a7658334e9d91a30d4..bcde27ceba3fec9bd6a1bc5c56338f533eb50505 100644 (file)
--- a/Content.Shared/Interaction/SharedInteractionSystem.cs
+++ b/Content.Shared/Interaction/SharedInteractionSystem.cs
@@ -159,7 +159,7 @@ namespace Content.Shared.Interaction
             if (uiComp == null)
                 return;
 
-            if (uiComp.SingleUser && uiComp.CurrentSingleUser != ev.Actor)
+            if (uiComp.SingleUser && uiComp.CurrentSingleUser != null && uiComp.CurrentSingleUser != ev.Actor)
             {
                 ev.Cancel();
                 return;