I have the exact same problem with ϨpeedsteЯ1712 (first character is Unicode 1000) but, strangely, not with any of these:
€urolandia (€ is Unicode 8364)
딥푸하고 친구들 (딥 is Unicode 46373)
I know that 딥푸하고 친구들 had a "Western" name before they changed to this. I have no idea if this might be the reason, nor if the same happened with €urolandia.
I don't have any other hit partner with either a Ϩ or a Я within their names, so I can't check if any of those are a problem.
Also, "_" seems to be solved (I have plenty of hit partners with that character in their names, and all are good.
As to (°\=/°) wally2cv & co, I do not have hits with him, so I can't test. Out of the unusual characters within that name, the only one I could test was "&", and it's working.
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