I've started a thread on this problem on #Learn:
https://forum.dlang.org/post/nmbmvzymsawzywpbtoaz@forum.dlang.org
Your (the Debuggers community) input would be much appreciated.
I'm referring the original post on the forum, as I'm hoping to keep all the answers in one place.
This will help future searches by others like me.
Thank you in advance,
Edi