crashing while farming. disconnect from laser to PC.
First, LightBurn should not crash. Thank you for reporting and drawing our attention. 
Please provide further details. What version of LightBurn and which OS and version? If you are willing, share the .LBRN2 project file and the steps you were taking at the time of the crash. We will need to reproduce here, so this will help. Please include any OS reports presented when you get a crash report.