In SDK version 6.2.2 I was able to record accelerometer and gyro data using a SensorLogging.SensorLogger with sensors running at 25Hz on my Epix Gen 2 and play it back in the device simulator. In SDK versions 6.3.0 and 6.3.1 this no longer works, either at 25Hz or at the new higher frequency sample rate.
In the Activity Data window the file plays back (i.e. the progress indicator moves) but the sensor callback function specified in Sensor.registerSensorDataListener is never called.
To be clear, the code works fine on my physical device, and it works if I switch the SDK version back to 6.2.2 with no other changes.