1.The food is put near the back wall;
2.The food stored contains high moisture.
How to solve:
Food should be stored with spaces in between in the fridge storage compartment. In particular, do not place food near its back wall. When the refrigerator is operating, the surface of the evaporator on the inner wall of the fridge storage compartment is of very low temperature and moisture will condense on the back board of it and then freeze or frost. When the refrigerator stops operating, the temperature in the compartment will rise, and the ice bead or frost will melt into water and flow out from the discharge outlet.
Do not place food of high moisture in the fridge storage compartment. If you really need to do so, you'd better to wrap it with a piece of preservative film.