Motor issue in DJI f450 drone

Hello. Thank you for reaching out my post. I had a drone dji f450 with pixhawk 4 mini. I have attached photo. The problem is that when I test motors from actuators section using QGroundControll it’s working fine. But when I arm motor and throttle up, at 20% only 2 out of 4 motors are working. If go up till 60-70% all 4 motors are working for a 3 4 seconds and one motor stop. I thought there might be an issue with power distribution, but when I reassigned motor orders, those issuing motors are changing. I have tried some combinations that might salve the issue that I got from ChatGPT, but still couldn’t salve the issue. Thank you in advance!