Power Query crashes often when exiting Advanced Editor after using CTRL+C to copy code.
I'm trying to reproduce the issue in Power BI desktop version 2.72.5556.801 64-bit (August 2019) but unfortunately not. Please update your Power BI desktop to this latest version then test again. If the issue still occurs, please share detail steps so we can try to test it.
Best Regards,Qiuyun Yu