Hi, as I mentioned in the Q&A, when the headset update its firmware or when you do a factory reset, the playing time/usage statistic data are reset. I don't store these data in the cloud, they are only on the device itself. If you install a tracking usage app on your phone this is the same. Data are lost in case of factory reset for example. Android wipe this kind of data.
I hope you will understand. This is a small and nice feature but not a cloud based feature.
https://anagan79.itch.io/quest-games-optimizer/devlog/538649/questions-answers