Wrong parameters logged in dataflash


on APM 2.5 and Arduplane 3.3.0…
I have the log_bimask set to 35446, which among the others switches off the IMU logging, but anyway after a quick check (power down, power up, arming…, power down, power up, connecting to MS and downloading the log) within the log I still see the IMU records.

I have checked this several time, reprogrammed the board, set the default parameters but still see the IMU within the log.

Do you have any idea what I do wrong ?
As the example, I attach the log file - clearly stated log_bitmask = 35446 ( no IMU) and you will see a lot of IMU inside.
What is wrong with it - please advise.

Thanks and regards