diff --git a/src/Core/Settings.h b/src/Core/Settings.h
index da420079766..8793bbb3011 100644
--- a/src/Core/Settings.h
+++ b/src/Core/Settings.h
@@ -481,7 +481,7 @@ static constexpr UInt64 operator""_GiB(unsigned long long value)
     M(Bool, optimize_if_chain_to_multiif, false, "Replace if(cond1, then1, if(cond2, ...)) chains to multiIf. Currently it's not beneficial for numeric types.", 0) \
     M(Bool, optimize_multiif_to_if, true, "Replace 'multiIf' with only one condition to 'if'.", 0) \
     M(Bool, optimize_if_transform_strings_to_enum, false, "Replaces string-type arguments in If and Transform to enum. Disabled by default cause it could make inconsistent change in distributed query that would lead to its fail.", 0) \
-    M(Bool, optimize_monotonous_functions_in_order_by, true, "Replace monotonous function with its argument in ORDER BY", 0) \
+    M(Bool, optimize_monotonous_functions_in_order_by, false, "Replace monotonous function with its argument in ORDER BY", 0) \
     M(Bool, optimize_functions_to_subcolumns, false, "Transform functions to subcolumns, if possible, to reduce amount of read data. E.g. 'length(arr)' -> 'arr.size0', 'col IS NULL' -> 'col.null' ", 0) \
     M(Bool, optimize_using_constraints, false, "Use constraints for query optimization", 0)                                                                                                                                           \
     M(Bool, optimize_substitute_columns, false, "Use constraints for column substitution", 0)                                                                                                                                         \
diff --git a/tests/queries/0_stateless/01321_monotonous_functions_in_order_by_bug.reference b/tests/queries/0_stateless/01321_monotonous_functions_in_order_by_bug.reference
new file mode 100644
index 00000000000..0c720206065
--- /dev/null
+++ b/tests/queries/0_stateless/01321_monotonous_functions_in_order_by_bug.reference
@@ -0,0 +1,2 @@
+2020-01-01 01:00:00	1
+2020-01-01 01:00:00	999
diff --git a/tests/queries/0_stateless/01321_monotonous_functions_in_order_by_bug.sql b/tests/queries/0_stateless/01321_monotonous_functions_in_order_by_bug.sql
new file mode 100644
index 00000000000..4aa52fe6ae8
--- /dev/null
+++ b/tests/queries/0_stateless/01321_monotonous_functions_in_order_by_bug.sql
@@ -0,0 +1,7 @@
+SELECT
+    toStartOfHour(c1) AS _c1,
+    c2
+FROM values((toDateTime('2020-01-01 01:01:01'), 999), (toDateTime('2020-01-01 01:01:59'), 1))
+ORDER BY
+    _c1 ASC,
+    c2 ASC
diff --git a/tests/queries/0_stateless/01576_alias_column_rewrite.sql b/tests/queries/0_stateless/01576_alias_column_rewrite.sql
index 8424eb11f9b..1f28225bef8 100644
--- a/tests/queries/0_stateless/01576_alias_column_rewrite.sql
+++ b/tests/queries/0_stateless/01576_alias_column_rewrite.sql
@@ -17,7 +17,7 @@ INSERT INTO test_table(timestamp, value) SELECT toDateTime('2020-01-01 12:00:00'
 INSERT INTO test_table(timestamp, value) SELECT toDateTime('2020-01-02 12:00:00'), 1 FROM numbers(10);
 INSERT INTO test_table(timestamp, value) SELECT toDateTime('2020-01-03 12:00:00'), 1 FROM numbers(10);
 
-set optimize_respect_aliases = 1;
+set optimize_respect_aliases = 1, optimize_monotonous_functions_in_order_by = 1;
 SELECT 'test-partition-prune';
 
 SELECT COUNT() = 10 FROM test_table WHERE day = '2020-01-01' SETTINGS max_rows_to_read = 10;
diff --git a/tests/queries/0_stateless/02149_read_in_order_fixed_prefix.sql b/tests/queries/0_stateless/02149_read_in_order_fixed_prefix.sql
index 4dfcbb9bf80..44c1c12be35 100644
--- a/tests/queries/0_stateless/02149_read_in_order_fixed_prefix.sql
+++ b/tests/queries/0_stateless/02149_read_in_order_fixed_prefix.sql
@@ -56,7 +56,13 @@ ENGINE = MergeTree ORDER BY (toStartOfDay(dt), d);
 INSERT INTO t_read_in_order SELECT toDateTime('2020-10-10 00:00:00') + number, 1 / (number % 100 + 1), number FROM numbers(1000);
 
 EXPLAIN PIPELINE SELECT toStartOfDay(dt) as date, d FROM t_read_in_order ORDER BY date, round(d) LIMIT 5;
-SELECT toStartOfDay(dt) as date, d FROM t_read_in_order ORDER BY date, round(d) LIMIT 5;
+SELECT * from (
+  SELECT toStartOfDay(dt) as date, d FROM t_read_in_order ORDER BY date, round(d) LIMIT 50000000000
+  -- subquery with limit 50000000 to stabilize a test result and prevent order by d pushdown
+) order by d limit 5;
 
 EXPLAIN PIPELINE SELECT toStartOfDay(dt) as date, d FROM t_read_in_order ORDER BY date, round(d) LIMIT 5;
-SELECT toStartOfDay(dt) as date, d FROM t_read_in_order WHERE date = '2020-10-10' ORDER BY round(d) LIMIT 5;
+SELECT * from (
+  SELECT toStartOfDay(dt) as date, d FROM t_read_in_order WHERE date = '2020-10-10' ORDER BY round(d) LIMIT 50000000000
+  -- subquery with limit 50000000 to stabilize a test result and prevent order by d pushdown
+) order by d limit 5;