Cannot Step Over/Into/Out in Monkey C after VS Code 1.79.0

This looks like a repeat of the earlier Microsoft bug in VS Code I reported last month
https://forums.garmin.com/developer/connect-iq/i/bug-reports/cannot-step-over-into-out-in-monkey-c-after-vs-code-1-78-0

It was fixed in Version 1.78.2 but has now reappeared.

Since Visual Studio Code Version 1.79.0 I can't Step after a breakpoint.
I can Continue OK but if I use one of the Step functions the line marker disappears and the Debug pane shows the program is running but, in fact, it isn't, it's hanging. If I then click Pause it will stop at the next line.

If I revert to Visual Studio Code 1.78.2 everything works again.

Simon