Operate by instructions only really starts working after restarting the debugger

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.