Hi Lewis 11777,
I've noticed ground vehicle formations with groundtype=direct, seemingly stuck but when you approach, they start moving. Have not noticed the problem with the trains. Yesterday I actually got in some time on the CFS3 computer for the first time this year. In ETO, a train came under fire near the coast - a US cruiser was shelling together with the escort destroyers in Era 3. A train carriage was hit (actually a tank car), but the train was still moving even though one of the carriages was kaput.
So no help there :isadizzy:. Have you checked the train.spawns spawn table file and the various train spawns files?