diff --git a/README.md b/README.md
index 5facd6d..c3fd807 100644
--- a/README.md
+++ b/README.md
@@ -8,6 +8,8 @@ scratch!
 ### Current state
 Well, we have a barebone framework for the World-Regions-Widget
 You can do very basic editing on existing world maps, like swapping regions with stored ones.
+It's making some use of threading, I'm not an expert though. The UI won't freeze up, that's the main thing. Can't get
+it to crash either, which is a good sign ^^
 
 #### Core Functions
 Loading of 7dtd RAW map files (dtm.raw, any RAW 16bit grayscale that's stored in order) (CTRL+O)
diff --git a/world_regions_widget/layout_region_label_collection.py b/world_regions_widget/layout_region_label_collection.py
index f6d6f40..52ad8dc 100644
--- a/world_regions_widget/layout_region_label_collection.py
+++ b/world_regions_widget/layout_region_label_collection.py
@@ -42,7 +42,7 @@ class WorkerUpdateLabelCollection(QThread):
             for x in range(0, self.regions_per_row):
                 self.region_label_helper.region_label_set_raw_data_array.emit(
                     create_region_string_from_grid_index(x=x + self.offset, y=y + self.offset),
-                    self.blockshaped_map_data[y][x].copy()
+                    self.blockshaped_map_data[y][x]
                 )
 
         self.progress.emit(100)
@@ -186,23 +186,24 @@ class RegionLabelCollection(QGridLayout):
             self.itemAt(i).widget().remove_label_pixmap()
 
     def update_label_collection_with_raw_map_data(self, raw_map_data, length):
-        self.clear_viewer_grid()
+        if self.load_collection_thread is None:
+            self.clear_viewer_grid()
 
-        raw_map_data = np.flipud(np.reshape(raw_map_data, (length, length)))
-        self.blockshaped_map_data = rearrange(raw_map_data, '(x dx) (y dy) -> x y dx dy', dx=512, dy=512)
+            raw_map_data = np.flipud(np.reshape(raw_map_data, (length, length)))
+            self.blockshaped_map_data = rearrange(raw_map_data, '(x dx) (y dy) -> x y dx dy', dx=512, dy=512)
 
-        self.load_collection_thread = QThread()
-        self.update_label_worker = WorkerUpdateLabelCollection(
-            self.blockshaped_map_data, self.region_label_helper
-        )
-        self.update_label_worker.moveToThread(self.load_collection_thread)
-        self.load_collection_thread.started.connect(self.update_label_worker.run)
-        self.update_label_worker.finished.connect(self.load_collection_thread.quit)
-        self.update_label_worker.finished.connect(self.update_label_worker.deleteLater)
-        self.load_collection_thread.finished.connect(self.load_collection_thread.deleteLater)
-        self.update_label_worker.progress.connect(self.update_label_collection_with_raw_map_data_progress)
-        self.load_collection_thread.finished.connect(self.update_label_collection_with_raw_map_data_done)
-        self.load_collection_thread.start()
+            self.load_collection_thread = QThread()
+            self.update_label_worker = WorkerUpdateLabelCollection(
+                self.blockshaped_map_data.copy(), self.region_label_helper
+            )
+            self.update_label_worker.moveToThread(self.load_collection_thread)
+            self.load_collection_thread.started.connect(self.update_label_worker.run)
+            self.update_label_worker.finished.connect(self.load_collection_thread.quit)
+            self.update_label_worker.finished.connect(self.update_label_worker.deleteLater)
+            self.load_collection_thread.finished.connect(self.load_collection_thread.deleteLater)
+            self.update_label_worker.progress.connect(self.update_label_collection_with_raw_map_data_progress)
+            self.load_collection_thread.finished.connect(self.update_label_collection_with_raw_map_data_done)
+            self.load_collection_thread.start()
 
     def update_label_collection_with_raw_map_data_progress(self, percentage):
         self.progress_bar_helper.progress_bar_percentage_signal.emit(percentage)