URLSessionStreamTask not working in cellular mode

I'm trying to setup a tcp connection from the Apple Watch standalone app to the server by using URLSessionStreamTask. Currently it's working perfectly under Wifi or Bluetooth connecting to my phone. However it's not working in cellular mode. I'm using the same code for iPhone as well. The code can also work in iPhone in cellular mode.
May I check whether URLSessionStreamTask supports cellular data in watchOS? Thanks!
can I contact with you? I'm working on watchOS app and I need to ask you about something
my Email is lujainabdullah993@gmail.com
URLSessionStreamTask not working in cellular mode
 
 
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