I have an odd issue with my Pro Harmony 36" Range, PRG366GH. The range has 6 burners, two of which are XLO. I recently noticed that when you push in before turning to light, the 4 regular burners have a constant clicking sound, then when you turn the knob they light. The XLO burners do not have that constant clicking noise when you push in, but when you turn the knob there is one click and they light.

I can't remember if they have always done this, or if it's a new thing (range is about 1 ½ years old). Either way, they are working so I'm not too worried, but not sure if I should be worried... is this something that could cause a problem down the road?

Thank you for any advice/insight.