Updated client and dedicated server to 0.199.429; logged into game. Continued working on a ship (didn't notice the rail issue at first.) Created a new rail, and created a sub entity from the advanced build menu. Moved into it and built both parts of a turret on it. Changed the direction of the rail on the main ship, but the entity did not move. After playing with the rail for a bit, and looking for a mistake that might have nested a block in collision, decided to check the status of other rails on the ship. All of the rails on the ship are frozen; nothing can move at the base ship level. One level up from the base, the rails work like normal.
The logic is all still connected and working correctly; the rails are changing direction as they should, just no movement. I verified my rail speed controllers, and mass enhancers.
An older version of the same ship docked to a station works fine, as does the logic on that station itself.
I changed sectors, moved away and reloaded the ship, no change.
I cleared my client cache and logged back in, and found that the new turret entity had moved about 70 blocks down the rail, but stopped before the end. Not sure if it stopped because I took over the ship, or stopped when all the chunks loaded.
I blueprinted the ship and spawned it fresh. The new copy has the same problem.
Ship has rail clocks, rail doors, door open sensors(using rail clocks), drone launching system, hangar organizing systems, all frozen.