Google Cloud Shell Editor Doesn't show Java line when debugger stops

Question

I am running a spring boot app in command line of cloud shell and attaching the to the debug port in Cloud Shell IDE. The debugger stops and shows me the call stack but I can't see the line in the IDE highlighted.

The same code works (highlights the line of code) locally in a VS Code in Mac.

Here is how server is started

./gradlew bootRun --debug-jvm

And here is the launch config for attaching to debug port

      {
          "type": "java",
          "name": "Attach to Remote Program",
          "request": "attach",
          "hostName": "localhost",
          "port": 5005
      }