In Markdown WYSIWYG mode, HI header in the first line is rendered as body text if it contains a colon

[chrillek]

There’s an older threat about this phenomenon

Colon in the first line of a Markdown text creates pseudo-empty note

I have been pushing text notes in Markdown format from Drafts to DTTG for a while now. I all worked well with one exception: If there was a colon in the first line of the note body it arrived empty in DDTG. I thought that some bug in my little JavaScript in Drafts I was unable to spot was the cause of that but I was wrong. It is DDTG itself and I find the same behaviour in the DTP 3 beta. When a Markdown note contains a colon (exception: a colon right at the beginning) in the first line of the…

In fact, Multimarkdown (the dialect implemented by DT/TG) uses colons in the first line to identify metadata (see MultiMarkdown User’s Guide). Personally, I find this choice a bit unfortunate, but there you are.

Markdown is not really a standard, there are many flavours, and you have work with (or around) the one provided by your tool(s).