Date and link "smart chips" missing from output

[CNG]

Hello,

In exporting a my documents where all headings are dates created with the calendar selector feature (when you hit @ and then under Date or Smart Chips), the result is a bunch of lines containing only blank headings (### instead of ### 2022-12-20 or whatever the date should be).

[CNG]

I found this problem also applies to other smart chips. For example, if you paste a URL in a doc (such as https://www.youtube.com/watch?v=QPL8dh6b1M0), Docs offers to replace it with an inline title of the YouTube video. Once that conversion happens, the link/title are absent from the generated Markdown.

[CNG]

Ah, I've now found this was reported before as #99