diff --git a/lib/dfu/src/main/java/no/nordicsemi/android/dfu/DfuBaseService.java b/lib/dfu/src/main/java/no/nordicsemi/android/dfu/DfuBaseService.java
index 242b16c5..d2fc0c4f 100644
--- a/lib/dfu/src/main/java/no/nordicsemi/android/dfu/DfuBaseService.java
+++ b/lib/dfu/src/main/java/no/nordicsemi/android/dfu/DfuBaseService.java
@@ -778,7 +778,7 @@ public abstract class DfuBaseService extends IntentService implements DfuProgres
 	 * Stores the last progress percent. Used to prevent from sending progress notifications with
 	 * the same value.
 	 */
-	private int mLastProgress = -1;
+	private int mLastProgress = 0;
 	/* package */ DfuProgressInfo mProgressInfo;
 	private long mLastNotificationTime;
 
@@ -1661,6 +1661,8 @@ protected void disconnect(@NonNull final BluetoothGatt gatt) {
 		if (mConnectionState == STATE_DISCONNECTED)
 			return;
 
+        mConnectionState = STATE_DISCONNECTING;
+
 		sendLogBroadcast(LOG_LEVEL_VERBOSE, "Disconnecting...");
 		mProgressInfo.setProgress(PROGRESS_DISCONNECTING);
 
@@ -1763,7 +1765,7 @@ protected void refreshDeviceCache(@NonNull final BluetoothGatt gatt, final boole
 	public void updateProgressNotification() {
 		final DfuProgressInfo info = mProgressInfo;
 		final int progress = info.getProgress();
-		if (mLastProgress == progress)
+		if (mLastProgress == progress && progress >= 0 && progress <= 100)
 			return;
 
 		mLastProgress = progress;