OK. Replying to myself here, having done a bit more research!
So I've joined SourceForge, subscribed to LibreCAD and found:
https://sourceforge.net/p/librecad/bugs/new/.
I'm not sure exactly where to report the bug (aka Create the Ticket) though?
Do the "Groups" 1.0 and 2.0 correspond to releases 1.0.0 and 2.0.0 (beta) of LibreCAD - or am I right off track?
A little more information on filing a bug would be appreciated...