Does the quotes module get exercised for inbox personal messages?
I have quotes 1.6.1 installed, Vanilla 2.1. It is working for discussions in the forum.
However, when I go to the personal messages inbox, what I see is bbcode rather than blockquotes.
From a previous discussion, I'm checking the validity of the bbcode and regex via https://www.debuggex.com, the regex seems fine.
Here's what shows up in the personal messages: