diff --git a/lib/wallets/wallet/wallet_mixin_interfaces/electrumx_interface.dart b/lib/wallets/wallet/wallet_mixin_interfaces/electrumx_interface.dart
index 1d793a012..6a044ff15 100644
--- a/lib/wallets/wallet/wallet_mixin_interfaces/electrumx_interface.dart
+++ b/lib/wallets/wallet/wallet_mixin_interfaces/electrumx_interface.dart
@@ -828,7 +828,7 @@ mixin ElectrumXInterface<T extends Bip39HDCurrency> on Bip39HDWallet<T> {
 
             _latestHeight = chainHeight;
 
-            if (isFirstResponse) {
+            if (isFirstResponse && !completer.isCompleted) {
               // Return the chain height.
               completer.complete(chainHeight);
             }