VSCode: "Markdown Preview" SHIFT-COMMAND-V not working

Setup:

VSCode 1.50.1MacOS High Sierra (10.13.6) - but I think this applies to any OS

Steps to Reproduce:

this is a quick simple one...

1. click on/hghlight/open a markdown file (.MD extension) in VSCode / from the Explorer tree hierarchy in the Left Nav Pane,
2. hit SHIFT-COMMAND-V per numerous instructional posts/tutorials - (you can also find the shortcut clearly labeled with that very same Shortcut Key-Combo:
   • if you RIGHT-CLICK on the file in question...
   • you will get a Context Menu with several options, include Markdown Preview
3. hitting the stated key combo of SHIFT-COMMAND-V does nothing,i.e.:
   • no observable effect in current window or tab
   • does not open any other tabs
   • does not render markdown