Left flipper not disabling

[Jason Brands]

When the flippers should be disabled (i.e. when clearing the shooting lane on start-up), the right flipper will disable, but the left does not.  Any idea why this would be?

My flippers are setup the same:

switches:
#flippers
  s_right_flipper:
    number: 0-0-27
    tags: right_flipper
  s_left_flipper:
    number: 0-0-19
    tags: left_flipper

flippers:
  left_flipper:
    main_coil: c_left_flipper
    activation_switch: s_left_flipper
  right_flipper:
    main_coil: c_right_flipper
    activation_switch: s_right_flipper

Thanks,

Jason