Workfront Proof: Cannot add user to proof by tagging the user in a comment

NOTE
The Product team is currently evaluating this issue resolution, which might require product enhancements. Product enhancements are communicated in the Product Announcements and not with the Maintenance Updates.

When a user tags another user who is not currently on the proof in a comment, they do not have the option to select a job role or email for the user, and therefore cannot add the user to the proof.

First reported on March 21, 2022.

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