Heat and airflow can reach beyond the pan or oven cavity. Fabric near burners, vents or hot surfaces creates a fire risk.
What the observation means
An open window can move a curtain into a location that appeared clear when still. The installation instructions establish required clearances; appearance alone is not enough.
A useful next step
Keep combustible items away and arrange appropriate room changes if clearances cannot be maintained. Do not attach a homemade heat shield to the cooker or cover its vents. If fabric has scorched, stop use and assess any resulting residue or damage safely.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.