Use correct seed on api world load

paper-server/src/main/java/org/bukkit/craftbukkit/CraftServer.java

@@ -1400,7 +1400,7 @@ public final class CraftServer implements Server {
             net.minecraft.server.Main.forceUpgrade(worldSession, DataFixers.getDataFixer(), this.console.options.has("eraseCache"), () -> true, iregistrycustom_dimension, this.console.options.has("recreateRegionFiles"));
         }
 
-        long j = BiomeManager.obfuscateSeed(creator.seed());
+        long j = BiomeManager.obfuscateSeed(worlddata.worldGenOptions().seed()); // Paper - use world seed
         List<CustomSpawner> list = ImmutableList.of(new PhantomSpawner(), new PatrolSpawner(), new CatSpawner(), new VillageSiege(), new WanderingTraderSpawner(worlddata));
         LevelStem worlddimension = iregistry.getValue(actualDimension);