Cannot add member to a personal contacts group with OWA

Hi all

My environment is currently Exchange 2013 CU 12.

I have a group in which I want to add this contact...

But cannot add it because the search when adding members to the group does not find it.

In Outlook it works correctly.

Do you know if there is any problem with the OWA or how to solve it? Or am i doing something wrong?

Thanks!

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