Just played with this version of the module and noticed that, when a unit loses its last block and moves to the opponent’s victory banner area, it leaves a movement trail. This trail is not cleared by ending the player’s turn. And there’s no longer a button to clear movement trails…
Intriguingly, the trails do disappear if I scroll so that the edge containing the relevant banners (the grey area) is no longer on the screen. They re-appear when I scroll back.
And they’re still there when I load a saved game.