Use the exact model specification. A matching door or drawer front does not establish that the compartment is designed to heat food or hold every household item.
What the observation means
Some cookers have storage, others have a proving or warming function, and their loading restrictions differ. Heat can also reach nearby compartments during normal cooking without making them approved ovens.
A useful next step
Check the manual before placing food, plastics or combustible items inside. If a compartment becomes unexpectedly hot, remove unsuitable contents only when safe and request advice. Do not add a heater or reinterpret a storage space as a slow-cooking cavity.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.