Problem solved !!
Thanks to Ortur Support who did really great.
My problem was due to my grounding, which was not properly done. Static electricity bursts from the X belt’s movements was causing the disconnections/error:8.
We attached a copper wire on one of the 4 screws of the laser module’s top plate.
Wire then connects to a X-axis’ gantry screw. From that screw, another wire goes and connects to the Y-axis’ gantry screw.
Wires go through cable looms to keep everything neat.
Since then, several jobs ran full length without a single disconnection or error’8
So this might also help op with his problem perhaps ?