diff --git a/src/main/scala/net/psforever/actors/net/MiddlewareActor.scala b/src/main/scala/net/psforever/actors/net/MiddlewareActor.scala
index bd56e9f8f..9ab353d4c 100644
--- a/src/main/scala/net/psforever/actors/net/MiddlewareActor.scala
+++ b/src/main/scala/net/psforever/actors/net/MiddlewareActor.scala
@@ -119,10 +119,7 @@ object MiddlewareActor {
     packet.isInstanceOf[CharacterInfoMessage]
   }
 
-  /**
-    * `KeepAliveMessage` packets are bundled by themselves.
-    * They're special.
-    */
+  /** `KeepAliveMessage` packets are bundled by themselves. They're special. */
   def keepAliveMessageGuard(packet: PlanetSidePacket): Boolean = {
     packet.isInstanceOf[KeepAliveMessage]
   }
diff --git a/src/main/scala/net/psforever/actors/session/SessionActor.scala b/src/main/scala/net/psforever/actors/session/SessionActor.scala
index f29757b02..98b3a5fd1 100644
--- a/src/main/scala/net/psforever/actors/session/SessionActor.scala
+++ b/src/main/scala/net/psforever/actors/session/SessionActor.scala
@@ -3655,7 +3655,9 @@ class SessionActor(middlewareActor: typed.ActorRef[MiddlewareActor.Command], con
           }
         }
         accessedContainer match {
-          case Some(veh: Vehicle) =>
+          // Ensure we don't unload the contents of the vehicle trunk for players seated in the vehicle.
+          // This can happen if PSUM arrives during the mounting process
+          case Some(veh: Vehicle) if player.VehicleSeated.isEmpty || player.VehicleSeated.get != veh.GUID =>
             if (
               isMoving || veh.isMoving(1) || Vector3.DistanceSquared(
                 player.Position,
@@ -3668,7 +3670,7 @@ class SessionActor(middlewareActor: typed.ActorRef[MiddlewareActor.Command], con
               UnaccessContainer(veh)
             }
           case Some(container) => //just in case
-            if (isMovingPlus) {
+            if (isMovingPlus && (player.VehicleSeated.isEmpty || player.VehicleSeated.get != container.GUID)) { // Ensure we don't close the container if the player is seated in it
               val guid = player.GUID
               // If the container is a corpse and gets removed just as this runs it can cause a client disconnect, so we'll check the container has a GUID first.
               if (container.HasGUID) {