A cord getting hot, or even warm is from the IEC metal contacts not having enough tension. I have found many through the years, mostly audiophile connectors from Furutech and Kimber. Those companies have the connector disassembled, for plating the metal inside. I suppose the people doing the work are not told to make sure the metal parts inside are within spec. for gap, tension, etc.
That is poor quality control and can cause a fire or other damage from the heat. Remember, a 14 AWG wire will not heat up until about 15 amps is drawn continuously. It will either be the metal tension or the screws holding the wire have become loose enough to cause resistance, and therefore Heat.