Corrupt ETHUSDT Data in Futures Testnet

ETHUSDT ist always showing the same price at open, high, low, close:

2021-10-01 09:29:00 3000.01 3000.01 3000.01 3000.01
2021-10-01 09:30:00 3000.01 3000.01 3000.01 3000.01
2021-10-01 09:31:00 3000.01 3000.01 3000.01 3000.01

With this data is testing not possible.

Please always provide raw responses as examples.
On our side, we’re not able to reproduce the reported:

Sorry, this was a mistake of me: The future data is okay. The problem occurs at the spot market in sandbox mode. Could you please validate this? But sorry I don’t know how to get the raw data.