Always check if a valid BSQ block explorer is set

core/src/main/java/bisq/core/user/Preferences.java

@@ -233,10 +233,6 @@ public void readPersisted() {
                     throw new RuntimeException("BaseCurrencyNetwork not defined. BaseCurrencyNetwork=" + baseCurrencyNetwork);
             }
 
-            // if no preference is set, randomly select a BSQ block explorer for the user
-            ArrayList<BlockChainExplorer> bsqExplorers = getBsqBlockChainExplorers();
-            setBsqBlockChainExplorer(bsqExplorers.get((new Random()).nextInt(bsqExplorers.size())));
-
             prefPayload.setDirectoryChooserPath(Utilities.getSystemHomeDirectory());
 
             prefPayload.setOfferBookChartScreenCurrencyCode(preferredTradeCurrency.getCode());
@@ -256,6 +252,12 @@ public void readPersisted() {
         useStandbyModeProperty.set(prefPayload.isUseStandbyMode());
         cssThemeProperty.set(prefPayload.getCssTheme());
 
+        // if no valid block explorer is set, randomly select a valid BSQ block explorer
+        ArrayList<BlockChainExplorer> bsqExplorers = getBsqBlockChainExplorers();
+        BlockChainExplorer bsqExplorer = getBsqBlockChainExplorer();
+        if (bsqExplorer == null || bsqExplorers.contains(bsqExplorer) == false)
+            setBsqBlockChainExplorer(bsqExplorers.get((new Random()).nextInt(bsqExplorers.size())));
+
         tradeCurrenciesAsObservable.addAll(prefPayload.getFiatCurrencies());
         tradeCurrenciesAsObservable.addAll(prefPayload.getCryptoCurrencies());
         dontShowAgainMapAsObservable.putAll(getDontShowAgainMap());