diff --git a/tests/queries/0_stateless/01646_fix_window_funnel_inconistency.reference b/tests/queries/0_stateless/01646_fix_window_funnel_inconistency.reference
new file mode 100644
index 00000000000..3b39d6021a2
--- /dev/null
+++ b/tests/queries/0_stateless/01646_fix_window_funnel_inconistency.reference
@@ -0,0 +1,3 @@
+2	1
+---
+2	1
diff --git a/tests/queries/0_stateless/01646_fix_window_funnel_inconistency.sql b/tests/queries/0_stateless/01646_fix_window_funnel_inconistency.sql
new file mode 100644
index 00000000000..51f599a2b09
--- /dev/null
+++ b/tests/queries/0_stateless/01646_fix_window_funnel_inconistency.sql
@@ -0,0 +1,49 @@
+DROP TABLE IF EXISTS trend;
+CREATE TABLE trend
+(
+    `event_date` Date,
+    `user_id` Int32,
+    `timestamp` DateTime,
+    `eventID` Int32,
+    `product` String
+)
+ENGINE = MergeTree()
+PARTITION BY toYYYYMM(event_date)
+ORDER BY user_id;
+
+insert into trend values ('2019-01-28', 1, '2019-01-29 10:00:00', 1004, 'phone') ('2019-01-28', 1, '2019-01-29 10:00:00', 1003, 'phone') ('2019-01-28', 1, '2019-01-28 10:00:00', 1002, 'phone');
+
+SELECT
+    level,
+    count() AS c
+FROM
+(
+    SELECT
+        user_id,
+        windowFunnel(6048000000000000)(timestamp, eventID = 1004, eventID = 1003, eventID = 1002) AS level
+    FROM trend
+    GROUP BY user_id
+)
+GROUP BY level
+ORDER BY level ASC;
+
+SELECT '---';
+
+TRUNCATE TABLE trend;
+insert into trend values ('2019-01-28', 1, '2019-01-29 10:00:00', 1003, 'phone') ('2019-01-28', 1, '2019-01-29 10:00:00', 1004, 'phone') ('2019-01-28', 1, '2019-01-28 10:00:00', 1002, 'phone');
+
+SELECT
+    level,
+    count() AS c
+FROM
+(
+    SELECT
+        user_id,
+        windowFunnel(6048000000000000)(timestamp, eventID = 1004, eventID = 1003, eventID = 1002) AS level
+    FROM trend
+    GROUP BY user_id
+)
+GROUP BY level
+ORDER BY level ASC;
+
+DROP TABLE trend;