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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:
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Looking at version 1.6.1, it doesn't hook into the conversation model (which runs the personal message system) at all.
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Thanks, that would explain it.
I guess I could try making changes, any hints on how I could hook that in?
Or another alternative, would be to convert the bbcode in pm's to blockquote, but I think I'd prefer using the quotes module.
Regards
Ricardo