Using VSCode With gr-tutorial

Am following the Wiki UsingVSCode page ( https://wiki.gnuradio.org/index.php?title=UsingVSCode ).

So, I set the breakpoint in the work function, it works as advertised, I hit the breakpoint.

I use F5 to continue a few times and then delete the breakpoint since I get it, it's looping.

The red breakpoint dot in front of my line of code goes away, turns into the symbol you now see at line 149:

And the code acts as if there still is a breakpoint set, when I use F5 to continue it just stops at line 149 over and over again.

Right click on the symbol just offers to set a new breakpoint / conditional breakpoint / watchpoint.

I can't google what to do because I don't know the name of that symbol (hollow play button thingy?).

Environment is Ubuntu 18.04 with VS Code 1.64.2 (one week old, no update available).

Thanks for any pointers,
Dave