Pasting formatted text is not perfect, very true. Programs store text when copied to the clipboard differently so we do our best to support common formats. Where are you copying from? (what program is the text in the screenshot from)
The original hope is to use the wiki functionality of Discourse to create best practices documents that the community can enhance or create their own. With not having a WYSIWYG editor plus copy/paste not always working, the chances of it being embraced are getting slimmer by the minute
It’s a known issue. Both MS Word and Google Docs have many edge cases while copy pasting formatted content. We will improve this functionality in future for sure.
If you paste from Word to a Gmail message most of the Word formatting is retained. If you then copy from the Gmail message to Google docs, once again most of the formatting is maintained. If you copy and paste directly the formatting is lost.
How mad is that?