When try to mail, Group contacts show "no members" in IOS / iPadOS 14.2

Hello

Because of my work, I usually send mail to groups.

I have several created in my MacBook Pro that with iCloud I use from the iPad and from the iPhone

1 week ago, I think I remember, when I send an email from the iPad and select the group, I see that it shows a text "no members".

Alarmed, I went to look at my MacBook and see that the groups are as usual and from the computer I can send emails to groups without problem.

This happens with iPadOS 14 and IOS 14.2

Does anyone know how to fix it?

Thanks

(upper image is from Mac, the other is from iPad)