A model with a demonstration function may behave that way, but the mode must be confirmed through its exact instructions. Lighting alone does not distinguish it from a fault.
What the observation tells you
Random online button combinations can enter unfamiliar settings and should not be used as a diagnostic shortcut. The appliance may also show stored values rather than actual temperatures. Food cannot remain safely stored on the assumption that this is only a display issue.
A useful next step
Check the manufacturer guidance or contact support with the full model. Follow only documented owner actions and arrange assessment if the mode is not confirmed.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.