Binance testnet - spot trading

Hello!
When using TESTNET spot trading, to be specific Market sell order, I'm getting order status EXPIRED, but the order is still executed, which was not happening before.

Did I mess something up, or is it testnet being testnet and returning wrong order status?

Btw. testnet would be way more useful if there was a 'fake' traffic mimicking the real one. Right now it's just a handful of coins with the rest being expired for real - no orders anywhere.