You're welcome, glad it worked and happy to know the procedure still works.Hi tonirai,
As you suggested i have edit setting.db and it started to work like magic.
Thank you very much for advice.
Developers could you fix it in the next update?
They won't fix it because, to my understanding, it's something embedded in android version (not in miui version).
But normally, you are good to go and it won't "disconfigure" again (it stayed ok in mine, after multiple updates of miui 6).