Will my users get confused if I call them by their username?

On our company's website, error messages, loading screens, etc. call users (who are logged in) by their username.

For instance:

• "Just a minute, [name]. Your content will be loaded shortly."
• "We're sorry, [name], but your action could not be completed."

Users' usernames are not supposed to be their real names. They can be screen names, such as "bobjoe101" or "alex_is_cool".

If I call users by their usernames, will they think that their username was supposed to be their real name, since they're being addressed as that?