A post was written by staff member. The post is a response to another post (by non-staff member) and has the “in response to X” symbol at the top right corner. (As it happens, the message is the one right above it.) Clicking the symbol opens up the message again on top of the message (showing the message to which the post is a reply to).
The post by staff member had staff color added. The color applied (bug!) to the replied message as well.
Just pushed a quick fix by adding additional specificity.
For future reference:
Selecting the nested replies: easy, because there’s .embedded-posts wrapping them
Selecting the parent post’s cooked content: easy, because it’s wrapped by .regular
Selecting the parent post’s avatar/meta: a little annoying, because there’s nothing distinguishing them from the .embedded-posts avatar/meta. At some point we should either expand the .regular wrapper to include the parent’s avatar/meta and cooked content, or just add a .regular class to them.