Back again!
I made a quick change and added another PSU and separate board output and heater output. Nothing changed.
I have measured AC outlet; 240 @ 50 hz. / PSU output 24.4 volt (stable) / Board input connector 23.6 volt (stable)
Board Vin voltage while printing took my attention. It is not stable and jumps between 22.4v to 24 volt.
I stopped printing and vin voltage becomes stable at 24.1 volt. Turned on hotend 1 and Vin dropped to 23.3 v.
I will check all my wirings again. There could be loose connection as I believe there shouldn't be a drop in voltage like this.