Pop-Out Chat "Multiple Number" Dialing not displaying numbers

Good morning, 

does anyone of you also encounter the issue, that you can not use the "arrow" in a Pop-Out Chat to show all available numbers for the account?

However when you are using the search and select the user, you are able to see the numbers. 

If you open a Pop-Out Chat, the button is also there, but not working. No numbers will be dispayled. 

2 Weeks ago that worked like a charm and was a nice workaround for calling numbers of Skype for Business users, where the "arrow" in the default chat view is not displayed . But now it is also not working for Teams-Only contacts anymore. Seems like that an Update may broke this functionality? 

Do you encounter the same problem? 

Thanks and Greets,
Markus