Edit: the title is supposed to say "trails"
On the multiplayer server i am playing on, trains dont seem to show any trails when viewing them through the remote view when viewing another planet. They do show when viewing it via remote view (i.e map view) while on the same planet though.
Trails also do not show when using the "Drive remotely" button that lets you drive said train remotely, but here also only when doing so on a different planet than the one your player is currently standing on.