Use @locking when sending uBridge commands. Ref https://github.com/GNS3/gns3-gui/issues/3651

gns3server/compute/base_node.py

@@ -662,6 +662,7 @@ class BaseNode:
         path = shutil.which(path)
         return path
 
+    @locking
     async def _ubridge_send(self, command):
         """
         Sends a command to uBridge hypervisor.