diff --git a/src/main/java/de/bixilon/minosoft/gui/rendering/world/LoadedMeshes.kt b/src/main/java/de/bixilon/minosoft/gui/rendering/world/LoadedMeshes.kt
index f74d77cd9..8a998a79d 100644
--- a/src/main/java/de/bixilon/minosoft/gui/rendering/world/LoadedMeshes.kt
+++ b/src/main/java/de/bixilon/minosoft/gui/rendering/world/LoadedMeshes.kt
@@ -88,14 +88,17 @@ class LoadedMeshes(
 
 
     operator fun contains(position: ChunkPosition): Boolean {
+        renderer.lock.acquire()
         lock.acquire()
         val contains = position in this.meshes
         lock.release()
+        renderer.lock.release()
         return contains
     }
 
 
     fun collect(visible: VisibleMeshes) {
+        renderer.lock.acquire()
         lock.acquire()
         for ((chunkPosition, meshes) in this.meshes) {
             if (!renderer.visibilityGraph.isChunkVisible(chunkPosition)) {
@@ -111,6 +114,7 @@ class LoadedMeshes(
             }
         }
         lock.release()
+        renderer.lock.release()
     }
 
     fun lock() {
diff --git a/src/main/java/de/bixilon/minosoft/gui/rendering/world/queue/CulledQueue.kt b/src/main/java/de/bixilon/minosoft/gui/rendering/world/queue/CulledQueue.kt
index d7aee9c96..22709829c 100644
--- a/src/main/java/de/bixilon/minosoft/gui/rendering/world/queue/CulledQueue.kt
+++ b/src/main/java/de/bixilon/minosoft/gui/rendering/world/queue/CulledQueue.kt
@@ -81,6 +81,7 @@ class CulledQueue(
 
 
     fun collect(): MutableList<Pair<Chunk, Int>> {
+        renderer.lock.acquire()
         lock.acquire() // The queue method needs the full lock of the culledQueue
 
         val world = renderer.world
@@ -112,6 +113,7 @@ class CulledQueue(
         world.chunks.lock.release()
 
         lock.release()
+        renderer.lock.release()
 
 
         return list
diff --git a/src/main/java/de/bixilon/minosoft/gui/rendering/world/queue/meshing/ChunkMeshingQueue.kt b/src/main/java/de/bixilon/minosoft/gui/rendering/world/queue/meshing/ChunkMeshingQueue.kt
index 2b5c24fdd..e4fd8e840 100644
--- a/src/main/java/de/bixilon/minosoft/gui/rendering/world/queue/meshing/ChunkMeshingQueue.kt
+++ b/src/main/java/de/bixilon/minosoft/gui/rendering/world/queue/meshing/ChunkMeshingQueue.kt
@@ -144,6 +144,7 @@ class ChunkMeshingQueue(
 
     fun queue(item: WorldQueueItem) {
         lock()
+        // TODO: don't remove and readd
         if (set.remove(item)) {
             queue -= item
         }