For pretty much everything in Markdown, it’s best practice to have a blank line between sections, including headings.
https://www.markdownguide.org/basic-syntax/#blockquotes-best-practices
https://www.markdownguide.org/basic-syntax/#heading-best-practices
For formatting questions or issues, the screenshots are helpful, but because of live preview and different themes, it would be better to put your source text in a code block by surrounding it above and below by three (or more) backticks `.
> like this
> so folks
have a clear picture of what's happening
See the forum formatting tips code block section for more info.