Why can't I spawn a trailer with a front bogie?

Every time I try, it creates instability until I remove the trailer, usually only part of the bogie actually spawns in. is there a mod i can do to the config to fix it? I was also trying to figure out how to connect a trailer a trailer and a bogie together, and save that as a vehicle group, but couldn't figure it out. as this option would alleviate the need to fix or alter this mod altogether.

 

not sure what mod you are using but it might be outdated due to the new semi trailer updates. Without mods you can spawn a dolly and trailer separately and connect them

 

well sure, but i set up huge road trains, and takes a long time. but it would be much faster, if i could spawn them in already connected.