Was just trying out the social share button in a layout, and it looks like DC strings are outputting strangely when there are special characters in the DC string.
Here’s a quick way to repro:
- Set up a blog post with an “&” in the title (e.g. “Introducing Bob & Jim”)
- In a blog post layout, add a social element
- Set that element to “Share”
- Set to share via email
- Add
{{dc:post:title}}to the Title field

Observed:
When you visit the front end and click the email link on that blog post, the title will be “Introducing Bob” (it drops everything after the &). I thought I saw it with some other special characters too.