I’m not sure how it works on all devices but I was able to use my Apple Watch just like I would at the gate. The cast member wasn’t sure if it would work but it did. I had the QR code ready to go, though.
It uses NFC doesn't it? Like mobile wallets? I wonder if they've had too many people w/o their NFC on. I don't use mobile wallets for anything, so mine is usually turned off (android phone, don't have a smart watch capable of NFC) The 1 time I tried to use a mobile wallet at a store (the only way I could think to use some electronic credit card rebate as a partial payment) it didn't work at first, so I thought it was just a loss. After a while I realized, "wait I don't use this function" and turned it on and boom it worked.
If I were to use the mobile magic, I'd have to remember to turn it on for my visit(s) and/or upgrade my smart watch to one that has it... Still debating if it's worth activating it for me.