Group Icon is not displayed for the users with 2byte letters (Japanese)

I am using your Playerlist and Group prefab in the JP region event. Your work is great!

However, we have an issue where the icon is not displayed for any player with a two-byte character in their name.
(It works fine for players whose names contain only alphabetic characters.)

I have checked that the .txt file for the Username List is set to UTF-8 encoding.

Please advise. Thank you.