LT-33222-L, OTAA, Downlink data rate not set correct

[zone11]

I'm using a LT-33222-L with TTN and OTAA.

Uplink is running fine out of the box.
Downlink didn't work until I manually set the data rate on the device to SF9/125 using "AT+RX2DR=3".
The device reported "AT+RX2DR=0" before the change.

Shouldn't this be done with the OTAA process?

[Alpha2Cool]

Same problem, RX2DR could only be set 8~11