We just updated from v8.17.1 to v8.20.1, and now whenever the use of an @mention is used for an issue comment, the email shows the username instead of the person's full name.
For example, it might say:
Hey johndoe and janedoe, you are correct about the calculation.
When instead, it should be showing:
Hey John Doe and Jane Doe, you are correct about the calculation.