Do you open the front door or remove the top panel?
Printing with the door closed will cause heat from the hot end and heat bed to build up in the chamber and the extruder motor to get hot.
The heat from the extruder motor transfers heat to the filament through the gears.
PLA softens at low temperatures and deforms unintentionally, causing the extruder to jam.
Try to keep the chamber temperature low by opening the door to keep the motor temperature down.