Thank you for your suggestion. Unfortunately downgrade to 2.2.5 did not solve the problem; synchronization stops at 12%, 18% or 22%. The battery is at 39% and tried to restart the phone without result. :-(
It seems that with this version there are many problems: Instagram crash, Mi fit does not update the data via bluetooth (reaches up to 25-45%) and other crashes with other apps.
Redmi Note 2