[Polizeiposaune]

I would assume that this is evidence that the reporting account has been disabled.

[swatcoder]

Yes, you can still click through if you don't hover, and the account is gone.

Presumably, the code that shows the preview just doesn't handle deleted accounts gracefully.

[Polizeiposaune]

Unfortunate that they deleted it and didn't / couldn't lock the account and flag all its submissions as suspect while leaving them in place for review.