Explicitly cancel operations on failure

app/src/main/java/eu/faircode/email/Core.java

@@ -149,8 +149,8 @@ class Core {
             boolean group = true;
             Log.i(folder.name + " executing operations=" + ops.size());
             while (retry < LOCAL_RETRY_MAX && ops.size() > 0 &&
-                    state.batchCanRun(folder.id, priority, sequence) &&
-                    state.isRunning() && ifolder.isOpen()) {
+                    state.isRunning() &&
+                    state.batchCanRun(folder.id, priority, sequence)) {
                 TupleOperationEx op = ops.get(0);
 
                 try {
@@ -3471,6 +3471,10 @@ class Core {
         void reset() {
             recoverable = true;
             lastActivity = null;
+            resetBatches();
+        }
+
+        void resetBatches() {
             synchronized (this) {
                 for (FolderPriority key : sequence.keySet()) {
                     batch.put(key, sequence.get(key));

app/src/main/java/eu/faircode/email/ServiceSynchronize.java

@@ -1486,6 +1486,9 @@ public class ServiceSynchronize extends ServiceBase implements SharedPreferences
                         }
                     });
 
+                    // Cancel running operations
+                    state.resetBatches();
+
                     // Close folders
                     for (EntityFolder folder : mapFolders.keySet())
                         if (folder.synchronize && !folder.poll && mapFolders.get(folder) != null) {