Required ventilation supports safe appliance use. Blocking it to reduce a draught can create a different hazard.
What the observation means
A flame affected by air movement needs the installation and appliance assessed appropriately, not a homemade screen over room vents. The correct arrangement depends on the appliance and room.
A useful next step
Stop using an abnormal hob and obtain qualified advice. Do not seal vents, alter burner settings or add foil windshields around flames. If gas or fumes cause an immediate concern, follow emergency guidance before ordinary repair discussion.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.