Don't sync, save, or load null seed wallets. They only act as a placeholder wallet when redeeming/refunding a P2SH.

src/main/java/org/qortal/controller/PirateChainWalletController.java

@@ -50,6 +50,10 @@ public class PirateChainWalletController extends Thread {
                     // Nothing to do yet
                     continue;
                 }
+                if (this.currentWallet.isNullSeedWallet()) {
+                    // Don't sync the null seed wallet
+                    continue;
+                }
 
                 LOGGER.debug("Syncing Pirate Chain wallet...");
                 String response = LiteWalletJni.execute("sync", "");

src/main/java/org/qortal/crosschain/PirateChain.java

@@ -439,7 +439,6 @@ public class PirateChain extends Bitcoiny {
 		PirateChainWalletController walletController = PirateChainWalletController.getInstance();
 		walletController.initNullSeedWallet();
 		walletController.ensureInitialized();
-		walletController.ensureSynchronized();
 
 		walletController.getCurrentWallet().unlock();
 
@@ -491,7 +490,6 @@ public class PirateChain extends Bitcoiny {
 		PirateChainWalletController walletController = PirateChainWalletController.getInstance();
 		walletController.initNullSeedWallet();
 		walletController.ensureInitialized();
-		walletController.ensureSynchronized();
 
 		walletController.getCurrentWallet().unlock();
 

src/main/java/org/qortal/crosschain/PirateWallet.java

@@ -190,6 +190,10 @@ public class PirateWallet {
             LOGGER.info("Error: can't save wallet, because no wallet it initialized");
             return false;
         }
+        if (this.isNullSeedWallet()) {
+            // Don't save wallets that have a null seed
+            return false;
+        }
 
         // Encrypt first (will do nothing if already encrypted)
         this.encrypt();
@@ -218,6 +222,10 @@ public class PirateWallet {
     }
 
     public String load() throws IOException {
+        if (this.isNullSeedWallet()) {
+            // Don't load wallets that have a null seed
+            return null;
+        }
         Path walletPath = this.getCurrentWalletPath();
         if (!Files.exists(walletPath)) {
             return null;