• VSCode Version: 1.16.0-insider
• OS Version: OSX 10.11.6

Steps to Reproduce:

1. Start debugger session with a debugger extension that supports multiple stopped threads.
2. Stop at least two threads.
3. Step over with the second thread.

Reproduces without extensions: Yes

Apologies for the watermark, but you can see the UI remains focused on the first thread after the second thread stops again. I think the UI should refocus on the thread that is most recently stopped.

I suspect the issue is in debugService.tryToAutoFocusStackFrame(). I think that if-statement should be true if there is no callstack or the current focused stack frame is in the same thread as the method parameter. So, something like this:

if (!callStack.length || (this.viewModel.focusedStackFrame && this.viewModel.focusedStackFrame.thread.threadId === thread.threadId)) {