This just happened to me in Sunset Gulch. When trains pass through crossings, signals, and switches, they are not detected, which can cause derailments. I'm using the normal Garrys mod and I don't understand what's going on.
I've already followed the troubleshooting steps, but nothing.

Hello! I would like to make an unusual recommendation and it is a Fireless steam locomotive for Gmod. A fireless steam locomotive generates its own power using pressurized steam stored in a tank, rather than burning fuel on board. It works similarly to a conventional steam engine but is powered by a stationary external boiler, making it ideal for industrial environments at risk of fire, such as refineries, chemical plants, and mines. You could use the German 0-6-0 fireless steam locomotives (such as the 'Sasol 5') as an example.
Seeing one in action on the switching yards in the game would be extraordinary.
Saludos desde el sureste de Mexico

reference images:
https://upload.wikimedia.org/wikipedia/commons/thumb/7/7a/Fireless_steam_locomotive_Sasol_01.jpg/2560px-Fireless_steam_locomotive_Sasol_01.jpg
https://www.steamlocomotive.info/largeimage.cfm?which=10312
(American Fireless)
https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcQSAh-s0_rbsei8xGgIe9x0gqXxCKSVqpl8SvVkI3Pdm3icHch8HwDIVsKr42Y_30lUUMc&usqp=CAU
https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcRoGrC5RhPn0sV7MOFfGshYG-aOTECjNXqe3w&s