Pre-assigned interpreters in a meeting

I planned a meeting and I pre-assigned 2 interpreters.

When the meeting started both the interpreters joined with the account associated with the email adresses I used.

I supposed they would be automatically recognized as interpreters, but this didn't happen!

So I manually assigned them to be the interpreters in the meeting.

If I planned a webinar and I pre-assigned interpreters...they are automatically recognized when they join the webinar!

Why the difference between webinar and meeting behavior? I didn't find any information about this difference on Zoom support.

Have you ever experienced the same problem?

Thank you.

   Isabella