There is one employee who schedule an interview but on mail, interviewer getting 'On Behalf of'

Content:

In our system, there is one employee who schedule the interview/Cancel the interview, and when she does that interviewer get email/team notification that it is scheduled from someone else behalf.
'Perez, April(Person who schedule) on behalf of Ensley, Emily (Random user) as instead of Perez, April ONLY…

And it is happening with her only. If someone's schedule this is not happening and no where random user related to recruiting.

Any idea why this is happening?

Warm Regards,

Aanila Nanda