it appears but the full name in parentheses is empty

You have
loginname (Full name)

I don't think it's an issue to have user () if full name is empty,
for me it's OK.

In Surey permission list : you don't have the () : it's worst in my opinion.

Capture d’écran du 2024-02-07 09-26-32.png (24,698 bytes)   

Capture d’écran du 2024-02-07 09-26-32.png (24,698 bytes)   

Ok not a issue, close ?

Only my opinion here.
Maybe need to report the other ?
I check if we can have 2 user with same label in this case.