So my LM3 has recently started to shut down / lose power mid job. once i push the power button it will turn on again. sometimes i can finish a long engrave with no issues, but other times the machine will turn off completely. I replaced the power supply and have also updated the firmware that Ortur customer service just emailed me in an attempt help. But still having issues. Has anyone had this issue before or know what might be causing this? thank you for any help!!!