How to retrieve Macro variable values on mouse hover?

I’m working on LibreOffice Basic macros under LibreOffice v5.1. It used to show variable values at runtime when you hover the mouse over a variable name in the IDE, but this has stopped. How can I get it back?

TIA

Works for me with scalar variables in LibO V 6.0.3.2 under Win 10.

Thanks, I’m under Linux Mint 18