Fixed #2311

core/src/mindustry/entities/comp/WaterMoveComp.java

@@ -35,6 +35,13 @@ abstract class WaterMoveComp implements Posc, Velc, Hitboxc, Flyingc, Unitc{
         }
     }
 
+    @Override
+    public void add(){
+        tleft.clear();
+        tright.clear();
+    }
+
+    @Override
     public void draw(){
         float z = Draw.z();
 

core/src/mindustry/graphics/Trail.java

@@ -18,6 +18,10 @@ public class Trail{
         points = new Seq<>(length);
     }
 
+    public void clear(){
+        points.clear();
+    }
+
     public void draw(Color color, float width){
         Draw.color(color);