1, natural gas supply problem, the gas source may be unstable, the pressure may affect your ignition, or the gas meter may be faulty, sometimes the valve is open and sometimes the valve is closed.
2. There is something wrong with the external connecting pipe. Check for blockage or squeezing.
3. There is something wrong with your own gas stove. Current cookers have weakness protection and air leakage protection. If the ignition pulse spark continues to ignite, the air valve will close. That's the problem with the cooker. It can only be repaired.