On Christmas, it was found that the Epic Games Launcher was erroneously utilizing CPUs, which resulted in unwanted temperature spikes even when systems were idle. However, it seems that the development team at the company is now aware of the issue and intends to issue a fix soon. In the end, it appears that we are just witnessing a bug with

Source: Hot Hardware – Epic Games Confirms High CPU Usage Bug Amid Concerns Over Its Games Launcher App