Bleed Air 1 Switching Problem

Just have to start by saying how impressed I am with LINDA.  I have just built my first subpanel for my 737 overhead, it is the pressure panel and am having a very small issue.

When I set BLEED AIR 2 toggle on/off the sim responds correctly (switch set to on position, BLEED AIR is on, set switch of to off position, BLEED AIR goes off), however, when I set the same for BLEED AIR 1, my switch cycles between on and off only when I have the switch pressed up.  In other words, if I want to switch BLEED AIR 1 on, I have to cycle the switch twice to get it to the on position.

I went into FSUIPC and set the switch here instead and the same thing happens.

Has anyone here experienced the same issue and if so, any suggestions

Thanks

Jim