Ok, hope the devs can see, I recently tried another livery (the BAE one with a BAE cabin) and BAM, the co pilot appeared again! but once I switched back to either cathay livery and default cabin, the co pilot vanished again. seems like it's a cabin+livery situation.
Since I am using all ini livery and cabin, please see if you guys can find out why it is the case and if so, please fix it if possible.
(for the default cabin, back in 1.0.9 the cathay livery pack will replace textures and logos to cathay in t he default cabin, but after 1.1.0 it no longer works and only showed the ini builds logo, please also try and see if this can be fixed.)