Laser stays On during rapid movement

I have an Eleksmaker A3 pro installed. I am facing the issue with laser that stays on between rapid movements. It burns images correctly but problem I face is mainly in texts and shapes drawn in lightburn. I am new to laser engraver. I have 2.5Watt Diode laser. I checked all the wirings and connections. The rapid movements lines are faint but clearly noticeable. Kindly Help me resolve this issue as I am planning to Buy lightburn for my further business expansion.