This was using my live mode keys. I was able to perform transactions in and then refund, using my Circle account, so they're live transactions. Those transactions are showing up in my live mode in the console, next to live CC transactions, which of course don't have the "test" banner.
If you were using your testmode keys, then we would not generate a valid bitcoin address (to avoid all kinds of confusion). It must be the case that these were your livemode keys. If you're able to reproduce an inaccurate "test mode" banner, can you send a bug report to bitcoin@stripe.com? You can cc me, christian@stripe.com. I'm happy to take a look, but I haven't been able to reproduce on my side.