diff --git a/src/conversations/java/eu/siacs/conversations/ui/ManageAccountActivity.java b/src/conversations/java/eu/siacs/conversations/ui/ManageAccountActivity.java
index c1ee451be..6aecf4b26 100644
--- a/src/conversations/java/eu/siacs/conversations/ui/ManageAccountActivity.java
+++ b/src/conversations/java/eu/siacs/conversations/ui/ManageAccountActivity.java
@@ -228,6 +228,7 @@ public class ManageAccountActivity extends XmppActivity implements OnAccountUpda
 
     @Override
     public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
+        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
         if (grantResults.length > 0) {
             if (allGranted(grantResults)) {
                 switch (requestCode) {
diff --git a/src/conversations/java/eu/siacs/conversations/ui/WelcomeActivity.java b/src/conversations/java/eu/siacs/conversations/ui/WelcomeActivity.java
index 8f652ce8e..9f3252ac1 100644
--- a/src/conversations/java/eu/siacs/conversations/ui/WelcomeActivity.java
+++ b/src/conversations/java/eu/siacs/conversations/ui/WelcomeActivity.java
@@ -201,6 +201,7 @@ public class WelcomeActivity extends XmppActivity implements XmppConnectionServi
 
     @Override
     public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
+        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
         UriHandlerActivity.onRequestPermissionResult(this, requestCode, grantResults);
         if (grantResults.length > 0) {
             if (allGranted(grantResults)) {
diff --git a/src/main/java/eu/siacs/conversations/ui/ConversationFragment.java b/src/main/java/eu/siacs/conversations/ui/ConversationFragment.java
index 5828ee221..9ad7caed5 100644
--- a/src/main/java/eu/siacs/conversations/ui/ConversationFragment.java
+++ b/src/main/java/eu/siacs/conversations/ui/ConversationFragment.java
@@ -1579,6 +1579,7 @@ public class ConversationFragment extends XmppFragment implements EditMessage.Ke
         }
         if (writeGranted(grantResults, permissions)) {
             if (activity != null && activity.xmppConnectionService != null) {
+                activity.xmppConnectionService.getBitmapCache().evictAll();
                 activity.xmppConnectionService.restartFileObserver();
             }
             refresh();
@@ -1617,9 +1618,9 @@ public class ConversationFragment extends XmppFragment implements EditMessage.Ke
 
     @SuppressLint("InflateParams")
     protected void clearHistoryDialog(final Conversation conversation) {
-        AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
+        final AlertDialog.Builder builder = new AlertDialog.Builder(requireActivity());
         builder.setTitle(getString(R.string.clear_conversation_history));
-        final View dialogView = getActivity().getLayoutInflater().inflate(R.layout.dialog_clear_history, null);
+        final View dialogView = requireActivity().getLayoutInflater().inflate(R.layout.dialog_clear_history, null);
         final CheckBox endConversationCheckBox = dialogView.findViewById(R.id.end_conversation_checkbox);
         builder.setView(dialogView);
         builder.setNegativeButton(getString(R.string.cancel), null);
@@ -1637,7 +1638,7 @@ public class ConversationFragment extends XmppFragment implements EditMessage.Ke
     }
 
     protected void muteConversationDialog(final Conversation conversation) {
-        AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
+        final AlertDialog.Builder builder = new AlertDialog.Builder(requireActivity());
         builder.setTitle(R.string.disable_notifications);
         final int[] durations = getResources().getIntArray(R.array.mute_options_durations);
         final CharSequence[] labels = new CharSequence[durations.length];
@@ -1653,13 +1654,13 @@ public class ConversationFragment extends XmppFragment implements EditMessage.Ke
             if (durations[which] == -1) {
                 till = Long.MAX_VALUE;
             } else {
-                till = System.currentTimeMillis() + (durations[which] * 1000);
+                till = System.currentTimeMillis() + (durations[which] * 1000L);
             }
             conversation.setMutedTill(till);
             activity.xmppConnectionService.updateConversation(conversation);
             activity.onConversationsListItemUpdated();
             refresh();
-            getActivity().invalidateOptionsMenu();
+            requireActivity().invalidateOptionsMenu();
         });
         builder.create().show();
     }