3 Second Delay to spark on Rangetop

We have a Viking gas range top with spark igniters. For years it would continue sparking after the burner lit Typically a longer post sparking cycle after the stovetop was cleaned. Recently the behavior have inverted. Now it will wait 3 seconds after the gas is turned on to spark once. It ignites the first time but the delay is troubling. THe behavior is not burner specific.

I've cleaned and de-greased all the igniters and everything above the stove surface.

Could this be one bad igniter? The igniter controller? loose ground/return and if so where to look?

I'd like to pre-order the parts so I'm not pulling it apart twice.

via 3 Second Delay to spark on Rangetop
by marknohr