ICM-20948 Sampling Rate

We are using the ICM-20948 in real time environment. The device supposed to provide accelerometer and Euler angles at specific sample rate 10, 20, 50, or 100Hz. We are using a Game Rotation feature to obtain the Euler, and while there is strong indication game rotation uses gyro (spec indicates w/o gyro enabled the PLL is not used to provide sampling clock). Unfortunately, regardless of the sample rate set, we never get the correct number of samples - usually, the real rate will be +/- 5%, and worst, it's not consistent. Before upgrading to 20948 we were using 9250 device and never had such problems but we just used Euler directly from the device. Since I'm jus asking if anyone stumbled on such issue as regardless how many times I ask the Tech Support I get no answer.
Regards
Stash