Hi thanks for the question.
Does it also take a longer time to ignite the gas once the Glow Coil comes on.
And can you smell a bit of gas.
Great so it just started.
The problem is with the Glow Coil.
Its not as hot as it used to be and the gas needs a good hot Glow Coil so it can ignite.
Its a common problem with all gas stoves.
So if you replace the Glow Coil it will fix the problem.