Good morning Vlad
I followed you comments, something still amiss. With the switch set to off (middle position), the starters (and igniter) run. With the switch in the upper position (start) they stop, with the switch in the lower position, the starter (and igniters) run. If I take both wires off as soon as I turn on master power the engine triesto start.
Here is my startup section
And here is the switch section
Also noticed that the version on Patreon is 9.59b, but the Hardware connect page that pops up (in XPlane) says 9.59a