dont' drop the handle

plugin/commands/workspace.py

@@ -199,3 +199,4 @@ class CodempDeleteBufferCommand(sublime_plugin.WindowCommand):
         except KeyError: pass
         finally:
             vws.handle.delete_buffer(buffer_id).wait()
+

plugin/core/buffers.py

@@ -82,7 +82,6 @@ class BufferManager():
         logger.debug(f"dropping buffer {self.id}")
         self.view.close()
         self.handle.clear_callback()
-        self.handle = None
 
     def __hash__(self):
         return hash(self.id)