Thank you for the input. As you will see above this is out of our hands the team creates and maintains the course but some areas are administered directly by the Duobot. It would help if you reported it next time in the "Report a problem" option on the exercise page which goes directly to Duo.
I will of course report it again from here.
"Ψύξη" is the process of lowering the temperature of the environment. "Ψυγείο" is the tool that gives us a limited space and the mechanism of temperature control within it, at a level below that of the environment. When temperatures, within this confined space, fall below 0°C or 32°f then we are talking about "Κατάψυξη" and the tool is called "Καταψύκτης".