Is it even a valid operation to change launch configurations in the middle of a debug session?

@ramya-rao-a
If it's invalid I think the dropdown should be grayed out. The current behavior is unexpected.

Other than that, changing the target and relaunching also has the same problem.

Maybe you can add a UX tag.

@isidorn I've seen something like this too. For me it typically happens for the same debug type: first I run a launch config "test", then I switch to launch config "server" and press the green start button. Later, when waiting for the server to startup, I notice that the tests are running again...

I believe this is a timing issue (race condition). While a debug session is running, it should not be possible to switch the launch config. But sometimes it seems to be possible. However, when the debug sessions ends the new launch config is switched back to old launch config.

You can still change launch configs while debugging, if you hide/show the debug sidebar.