The operate by instruction feature of the debugger only really works after stopping debugging and starting another debugger run.

Ways to reproduce:

1. Run simple app from tests and set a breakpoint.
2. Toggle "Operate by instruction" in the Debugger menu.
3. Single step the code

Expected would be a switch from C++ code to assembly right away, but this does not happen.

Only after stopping the debugger and starting it again do I see assembly code.