All "cliff" terrain tiles are lost (even in map editor)(latest DEV version). It affects campaign & multip maps (e.g. War of Factions-> Once Again At Home Territory) that contain "cliff" tiles. @Endru1241 @Stratego (dev)
If you mean parts of cliffs being shown as shallow water coast - it was id bug I accidentally made, ehile adding terrains.
We fixed it 3 days ago with stratego, so either it was never put on server somehow or replaced by old files on next dev update.
Anyway should be working asap.