From f52984553bf0d59856f006bc118b0826d7e457e0 Mon Sep 17 00:00:00 2001
From: Vera Aguilera Puerto <zddm@outlook.es>
Date: Sun, 20 Dec 2020 23:04:48 +0100
Subject: [PATCH] Fix airblocked space tiles venting air Fixes part of #2780

---
 .../GameObjects/Components/Atmos/GridAtmosphereComponent.cs | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/Content.Server/GameObjects/Components/Atmos/GridAtmosphereComponent.cs b/Content.Server/GameObjects/Components/Atmos/GridAtmosphereComponent.cs
index 12ee989ebd..193b606eb0 100644
--- a/Content.Server/GameObjects/Components/Atmos/GridAtmosphereComponent.cs
+++ b/Content.Server/GameObjects/Components/Atmos/GridAtmosphereComponent.cs
@@ -218,13 +218,15 @@ namespace Content.Server.GameObjects.Components.Atmos
                     Tiles[indices] = tile;
                 }
 
-                if (IsSpace(indices))
+                var isAirBlocked = IsAirBlocked(indices);
+
+                if (IsSpace(indices) && !isAirBlocked)
                 {
                     tile.Air = new GasMixture(GetVolumeForCells(1), AtmosphereSystem);
                     tile.Air.MarkImmutable();
                     Tiles[indices] = tile;
 
-                } else if (IsAirBlocked(indices))
+                } else if (isAirBlocked)
                 {
                     tile.Air = null;
                 }