When attempting to Reply to a PM I received: "Value is required and can't be empty"

I received a PM on this forum from a PlayStation user by the name of RivvenStarkker. I clicked Reply, their name was in the To: field as normal, but upon Submitting my reply a red text error in the To: field appeared under their name:

Value is required and can't be empty

So I tried removing their name by clicking the X, then adding it by copy+pasting RivvenStarkker. It returned this error:

Could not find an account with the name RivvenStarkker

I then tried going to their profile (I was wondering if it was some privacy setting), it worked, okay, let's try the PM button. It brought me to:

https://www.pathofexile.com/private-messages/compose/to/RivvenStarkker@sony

Yet their name wasn't in the To: field. I tried adding it like before and received the same error. Then I noticed the @sony in the link and tried adding RivvenStarkker@sony. It worked! Weird.

But when I tried to Submit my PM again, it returned the original error:



Finally, I clicked Report to Support hoping it'd be like reporting a post where I could write out what the problem was, but all that did was mark the PM as reported. Ack! No way that I can see to undo it, either.

So in short, this person is asking me for build help but I have no way to reply back.

I just tried to make a quote with their name, and it comes out blank:

"

RivvenStarkker wrote:

quote="RivvenStarkker"

"

RivvenStarkker wrote:

quote="RivvenStarkker" realm="sony"

Yay, it worked! I was able to send them a PM.

They won't have any trouble logging in, I hope. How in the world did they get mismatched names?