@karrad, second extruder is not used in this print, only one model loaded and assigned to first hot end, but while printing, it extrude from second hot end while it moves all toolhead correctly in coordinates of first hot end. Problem is not in gcode generation, it seems like bug in firmware, because it replicates every time on different layers. The result of this - skipped layers and broken print.
@victor_larchenko : I'm wondering if T1 was selected from a previous print? Unless T0 is at the start of the print, the printer will remember whatever extruder was last used. The default toolhead could also be changed if a user performs a manual operation from the LCD. So Cura should always start a print by setting the toolhead to whatever it needs to be.