AEG Dishwater getting hot.

Integrated dishwasher fitted 8 years ago, no problems at all. It is installed next to my fridge freezer and sadly shares the same spur in the kitchen. The other night I noticed that the fridge freezer was off, the dishwasher was also off half way through it’s cycle. There was steam in the dishwasher which it has always done. The fuse was not blown on the spur and when the dishwasher was disconnected the fridge freezer cam back on. It would seem that the dishwasher is robbing the fridge freezer of electricity. Can anyone help please. Regards and keep safe.