Emoji (Unicode) not working in participants list or chat, but fine in Rename dialog and main window

[MarcelB]

As you can see on the attached image,

(1) names containing Unicode (emojis) are not displayed correctly in the participants list.

Same person that does not display correctly in (2) is fine in the rename dialog box (3) and on main screen (4).

This was not the case in January, but started to happen over the spring.

Any idea ?