Why is the whole batch of Extreme x440 24t getting so hot?

Question

network hardware

We bought a huge number of 440x 24-port and 48-port extreme switches for our office, but the fig is that it is 24 switches in the amount of 15 pieces that heat up noticeably that the case burns the hand, but 48-port ones do not. And the funny thing is that the 24 port valves do not spin, but spin at 48. But at 24 ports, sometimes the valve turns on by itself, but then you can already fry eggs on them. Is the entire batch of 24 ports so defective?