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A5S nozzle too high/bed leveling issue?

Hey guys, lately I am having problems with my JG Aurora A5S.
Running custom FW, mesh bed leveling enabled.

So here is what I am experiencing lately:
Print starts fine with purge line, but when it is supposed to draw first layer, it looks like nozzle is at least 2mm away from the bed?
Of course nothing will stick and first layer is crap.
Here is what I have as a start G Code, used to work perfectly.
What am I missing?

G28 ;home all axis
M420 S1 ;turn on mesh bed levelling if enabled in firmware
G92 E0 ;zero the extruded length
G1 Z1 F1000 ;move up slightly
G1 X60.0 Z0 E9.0 F1000.0;intro line
G1 X100.0 E21.5 F1000.0 ;continue line
G92 E0 ;zero the extruded length again
; -- end of START GCODE --
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