I misremembered it. It wasn't the USD/USD starting at 0.9. It's that if you use a spot order, the price traded on Binance won't match the current price, which was around 0.78.
(Time is Japan time, which is 5:49 AM in China.)
@heyibinance @sisibinance @cz_binance Miss Yi, is this a bug with the spot order or is it just set up that way?