Re: [BUG] Newlines and paragraphs are replaced by whitespace when copying text
From which source (which app) do you copy this text? When I copy your sample text from your message opened in Chrome browser, and copy paste or mark and share, it works correctly, exactly as you wanted. Most likely the source app from which you copy does not copy correctly line markers etc.
There is also an option in @Voice app, under "Reload or clear" button on top (circular arrows), which toggles between "Separate lines" and "Join lines". It appears if you open or paste plain text. Try both options.
Whenever possible, do not use copy/paste or mark text and share, but simply the Share function or button in the source app, select @Voice icon as the target of share. It's faster and in many cases may work better than copying or marking text and sharing.