diff --git a/.idea/misc.xml b/.idea/misc.xml
index fbb68289..5d199810 100644
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -37,7 +37,7 @@
     <ConfirmationsSetting value="0" id="Add" />
     <ConfirmationsSetting value="0" id="Remove" />
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" default="true" assert-keyword="true" jdk-15="true" project-jdk-name="1.8" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_7" default="true" assert-keyword="true" jdk-15="true" project-jdk-name="1.8" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/build/classes" />
   </component>
   <component name="ProjectType">
diff --git a/app/build.gradle b/app/build.gradle
index 14f2d91a..d3a0ad4d 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -8,8 +8,8 @@ android {
         applicationId "com.m2049r.xmrwallet"
         minSdkVersion 21
         targetSdkVersion 25
-        versionCode 17
-        versionName "0.8.0.4"
+        versionCode 18
+        versionName "0.8.0.5"
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
         externalNativeBuild {
             cmake {
diff --git a/app/src/main/cpp/monerujo.cpp b/app/src/main/cpp/monerujo.cpp
index 0fc382fe..56a435ab 100644
--- a/app/src/main/cpp/monerujo.cpp
+++ b/app/src/main/cpp/monerujo.cpp
@@ -39,6 +39,8 @@ static jclass class_WalletListener;
 static jclass class_TransactionInfo;
 static jclass class_Transfer;
 
+std::mutex _listenerMutex;
+
 JNIEXPORT jint JNICALL JNI_OnLoad(JavaVM *jvm, void *reserved) {
     cachedJVM = jvm;
     LOGI("JNI_OnLoad");
@@ -101,6 +103,7 @@ struct MyWalletListener : Bitmonero::WalletListener {
     };
 
     void deleteGlobalJavaRef(JNIEnv *env) {
+        std::lock_guard<std::mutex> lock(_listenerMutex);
         env->DeleteGlobalRef(jlistener);
         jlistener = nullptr;
     }
@@ -109,6 +112,7 @@ struct MyWalletListener : Bitmonero::WalletListener {
  * @brief updated  - generic callback, called when any event (sent/received/block reveived/etc) happened with the wallet;
  */
     void updated() {
+        std::lock_guard<std::mutex> lock(_listenerMutex);
         if (jlistener == nullptr) return;
         LOGD("updated");
         JNIEnv *jenv;
@@ -128,6 +132,7 @@ struct MyWalletListener : Bitmonero::WalletListener {
      * @param amount     - amount
      */
     void moneySpent(const std::string &txId, uint64_t amount) {
+        std::lock_guard<std::mutex> lock(_listenerMutex);
         if (jlistener == nullptr) return;
         LOGD("moneySpent %"
                      PRIu64, amount);
@@ -139,6 +144,7 @@ struct MyWalletListener : Bitmonero::WalletListener {
      * @param amount        - amount
      */
     void moneyReceived(const std::string &txId, uint64_t amount) {
+        std::lock_guard<std::mutex> lock(_listenerMutex);
         if (jlistener == nullptr) return;
         LOGD("moneyReceived %"
                      PRIu64, amount);
@@ -150,6 +156,7 @@ struct MyWalletListener : Bitmonero::WalletListener {
      * @param amount        - amount
      */
     void unconfirmedMoneyReceived(const std::string &txId, uint64_t amount) {
+        std::lock_guard<std::mutex> lock(_listenerMutex);
         if (jlistener == nullptr) return;
         LOGD("unconfirmedMoneyReceived %"
                      PRIu64, amount);
@@ -160,6 +167,7 @@ struct MyWalletListener : Bitmonero::WalletListener {
      * @param height        - block height
      */
     void newBlock(uint64_t height) {
+        std::lock_guard<std::mutex> lock(_listenerMutex);
         if (jlistener == nullptr) return;
         //LOGD("newBlock");
         JNIEnv *jenv;
@@ -178,6 +186,7 @@ struct MyWalletListener : Bitmonero::WalletListener {
  * @brief refreshed - called when wallet refreshed by background thread or explicitly refreshed by calling "refresh" synchronously
  */
     void refreshed() {
+        std::lock_guard<std::mutex> lock(_listenerMutex);
         if (jlistener == nullptr) return;
         LOGD("refreshed");
         JNIEnv *jenv;
@@ -465,14 +474,15 @@ JNIEXPORT jboolean JNICALL
 Java_com_m2049r_xmrwallet_model_WalletManager_closeJ(JNIEnv *env, jobject instance,
                                                      jobject walletInstance) {
     Bitmonero::Wallet *wallet = getHandle<Bitmonero::Wallet>(env, walletInstance);
-    bool closeSuccess = Bitmonero::WalletManagerFactory::getWalletManager()->closeWallet(wallet, false);
+    bool closeSuccess = Bitmonero::WalletManagerFactory::getWalletManager()->closeWallet(wallet,
+                                                                                         false);
     if (closeSuccess) {
         MyWalletListener *walletListener = getHandle<MyWalletListener>(env, walletInstance,
                                                                        "listenerHandle");
         if (walletListener != nullptr) {
             walletListener->deleteGlobalJavaRef(env);
+            delete walletListener;
         }
-        delete walletListener;
     }
     LOGD("wallet closed");
     return closeSuccess;
@@ -601,7 +611,8 @@ Java_com_m2049r_xmrwallet_model_Wallet_initJ(JNIEnv *env, jobject instance,
     const char *_daemon_username = env->GetStringUTFChars(daemon_username, JNI_FALSE);
     const char *_daemon_password = env->GetStringUTFChars(daemon_password, JNI_FALSE);
     Bitmonero::Wallet *wallet = getHandle<Bitmonero::Wallet>(env, instance);
-    bool status = wallet->init(_daemon_address, upper_transaction_size_limit, _daemon_username, _daemon_password);
+    bool status = wallet->init(_daemon_address, upper_transaction_size_limit, _daemon_username,
+                               _daemon_password);
     env->ReleaseStringUTFChars(daemon_address, _daemon_address);
     env->ReleaseStringUTFChars(daemon_username, _daemon_username);
     env->ReleaseStringUTFChars(daemon_password, _daemon_password);
@@ -919,7 +930,7 @@ jobject newTransferInstance(JNIEnv *env, uint64_t amount, const std::string &add
 
 jobject newTransferList(JNIEnv *env, Bitmonero::TransactionInfo *info) {
     const std::vector<Bitmonero::TransactionInfo::Transfer> &transfers = info->transfers();
-    if (transfers.size()==0) { // don't create empty Lists
+    if (transfers.size() == 0) { // don't create empty Lists
         return nullptr;
     }
     // make new ArrayList
diff --git a/app/src/main/java/com/m2049r/xmrwallet/LoginFragment.java b/app/src/main/java/com/m2049r/xmrwallet/LoginFragment.java
index 95072271..58571c7d 100644
--- a/app/src/main/java/com/m2049r/xmrwallet/LoginFragment.java
+++ b/app/src/main/java/com/m2049r/xmrwallet/LoginFragment.java
@@ -186,7 +186,7 @@ public class LoginFragment extends Fragment {
         etDaemonAddress.setOnFocusChangeListener(new View.OnFocusChangeListener() {
             @Override
             public void onFocusChange(View v, boolean hasFocus) {
-                if (hasFocus) {
+                if (hasFocus && !getActivity().isFinishing()) {
                     etDaemonAddress.showDropDown();
                     Helper.showKeyboard(getActivity());
                 }