Turn the control off and follow the appliance's instructions before any permitted relighting. Do not leave gas flowing while searching for the cause.
What the observation means
Open windows, moving doors and ventilation can affect the cooking area, but required room ventilation must not be blocked as a remedy. Persistent extinction needs assessment.
A useful next step
Use the model's waiting and ignition procedure only when safe. If gas is smelled, stop and follow emergency guidance. Do not shield the burner with loose foil or disable a flame-safety device to keep the hob operating.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.