Mine did exactly that when the red cable under the gantry got overextended and hung down just far enough to hang on the fins of the heat sink when the gantry homed.
To check it, turn off the machine, gently pull the gantry forward about halfway, lower the front door, get down on your knees with a flashlight and point it underneath the gantry on the left side of the machine. You should see a red cable under the gantry that runs all the way across underneath the tube. Keep your eye on that and slowly move the gantry back to the home position. Watch that cable and make sure it clears the fins on the heat sink. Stop if it snags, and tell support what’s happening. They can give you instructions on how to fix it. (Don’t use the machine until you hear from them, you don’t want to damage that cable.)