Underscore does not appear in VSCode terminal windows (Mint 20.2)

This is a small annoyance: the underscore character _ does not appear in the terminal window of VSCode:


the expected output is:

julia> Char('_')
'_': ASCII/Unicode U+005F (category Pc: Punctuation, connector)


Everything works as if it was there, but it is invisible. Any idea what might be wrong there?

It is a known issue: [bug] invisible underscore in integrated-terminal · Issue #38133 · microsoft/vscode · GitHub

The problem is a combination of zoom level and font size. Changing the font size of the terminal to 13 (it was 14) solved the issue here.