MKS_GenL v1 issue

I have a FLSUN i3 with an MKS Gen L v1 mainboard.
I flashed Marlin 1.1.9 and the printer seems be working well, except for one thing. The print head moves up about 1mm just before it lays down the filament.
It moves up a few mm, then zero's itself. it then moves to print and at last moment, it raises a bit.

This is my G-code. I looked in the config.h file, but don't really know what I should be looking for.

G28 ;home
G92 E0 ;Reset Extruder
G1 X1.1 Y20 Z0.28 F5000.0 ;Move to start position
G1 X1.1 Y200.0 Z0.28 F1500.0 E15 ;Draw the first line
G1 X1.4 Y200.0 Z0.28 F5000.0 ;Move to side a little
G1 X1.4 Y20 Z0.28 F1500.0 E30 ;Draw the second line

Any help would be great,
Ian

as you see gcode is just text

So slice something so you have a gcode file

use something like pronterface and feed in the lines 1 by 1, see what is causing what to happen

I sliced something on a different slicer with different G-code and it was the same thing, so I presume it's in the config.h file somewhere.

perhaps, but until you track down what gcode, you will never be able to find it