Some burners don’t spark

Hello everyone and thank you for listening to me. I have a Kenmore stove/oven model number 790 72909015. It has four burners and a center burner. The right side works fine. The left front ignites properly. When I turn on the left rear to light I hear clicking and see sparking in the left front and nothing in the left rear. I can like that one with a match. When I try to light the center I get the same situation I see sparking I hear clicking in the left front! I do not see a spark at the center burner. Again I could like that burner with the match. Thank you in advance for advice. I hope everyone is safe!