diff --git a/src/DataTypes/NestedUtils.cpp b/src/DataTypes/NestedUtils.cpp
index e988490a487..5f8b9f877bf 100644
--- a/src/DataTypes/NestedUtils.cpp
+++ b/src/DataTypes/NestedUtils.cpp
@@ -86,7 +86,8 @@ Block flatten(const Block & block)
     {
         if (const DataTypeArray * type_arr = typeid_cast<const DataTypeArray *>(elem.type.get()))
         {
-            if (const DataTypeTuple * type_tuple = typeid_cast<const DataTypeTuple *>(type_arr->getNestedType().get()))
+            const DataTypeTuple * type_tuple = typeid_cast<const DataTypeTuple *>(type_arr->getNestedType().get());
+            if (type_tuple && type_tuple->haveExplicitNames())
             {
                 const DataTypes & element_types = type_tuple->getElements();
                 const Strings & names = type_tuple->getElementNames();
diff --git a/src/DataTypes/NestedUtils.h b/src/DataTypes/NestedUtils.h
index 098d98699e4..3039fd7f118 100644
--- a/src/DataTypes/NestedUtils.h
+++ b/src/DataTypes/NestedUtils.h
@@ -17,6 +17,7 @@ namespace Nested
     std::string extractTableName(const std::string & nested_name);
 
     /// Replace Array(Tuple(...)) columns to a multiple of Array columns in a form of `column_name.element_name`.
+    /// only for named tuples that actually represent Nested structures.
     Block flatten(const Block & block);
 
     /// Collect Array columns in a form of `column_name.element_name` to single Array(Tuple(...)) column.
diff --git a/src/Storages/ColumnsDescription.h b/src/Storages/ColumnsDescription.h
index 72399a70128..4fbb041d124 100644
--- a/src/Storages/ColumnsDescription.h
+++ b/src/Storages/ColumnsDescription.h
@@ -61,6 +61,7 @@ public:
     /// TODO add ability to rename nested columns
     void rename(const String & column_from, const String & column_to);
 
+    /// NOTE Must correspond with Nested::flatten function.
     void flattenNested(); /// TODO: remove, insert already flattened Nested columns.
 
     bool operator==(const ColumnsDescription & other) const { return columns == other.columns; }
diff --git a/tests/queries/0_stateless/01254_array_of_unnamed_tuples.reference b/tests/queries/0_stateless/01254_array_of_unnamed_tuples.reference
new file mode 100644
index 00000000000..0342c7b7310
--- /dev/null
+++ b/tests/queries/0_stateless/01254_array_of_unnamed_tuples.reference
@@ -0,0 +1,10 @@
+[(nan,1.1460459347849696e-169)]	`xbguF	1493493065813843889
+[(-2.6774132404843463e217,-1.5941466176583548e-32)]	?/;UTko	8163231169061670909
+[(4.559039863342969e-218,1.1023812988249403e186)]	k3Igp@	9512519566588292358
+[(-6.156499824044965e254,2.125276757267567e176)]		12763761121429990320
+[]	TlL	10781278062399783511
+[(-1.6511853645079817e-21,-1.5094564365588905e303)]	UeS}D	1158449958889177529
+[(-5.109297304033652e229,-8.565674764550042e219),(-2.163260216301827e-75,-3.771562357185976e285)]	0Z3|h	12502841092151487477
+[]	-]	2092132020040612180
+[(-2.9588901009588613e-146,-6.4241843242744556e268)]	&b!M-e;7	10616749141511339887
+[(3.084905744030789e-98,-4.973771413288743e177),(-1.8198487259356486e114,1.2449864950522508e251)]	Dj7peUH{T	5992776369613298329
diff --git a/tests/queries/0_stateless/01254_array_of_unnamed_tuples.sql b/tests/queries/0_stateless/01254_array_of_unnamed_tuples.sql
new file mode 100644
index 00000000000..3660d66620c
--- /dev/null
+++ b/tests/queries/0_stateless/01254_array_of_unnamed_tuples.sql
@@ -0,0 +1,5 @@
+DROP TABLE IF EXISTS mass_table_457;
+CREATE TABLE mass_table_457 (key Array(Tuple(Float64, Float64)), name String, value UInt64) ENGINE = Memory;
+INSERT INTO mass_table_457 SELECT * FROM generateRandom('`key` Array(Tuple(Float64, Float64)),`name` String,`value` UInt64', 1, 10, 2) LIMIT 10;
+SELECT * FROM mass_table_457;
+DROP TABLE mass_table_457;
diff --git a/tests/queries/0_stateless/01255_geo_types_livace.reference b/tests/queries/0_stateless/01255_geo_types_livace.reference
new file mode 100644
index 00000000000..3982d6fb18a
--- /dev/null
+++ b/tests/queries/0_stateless/01255_geo_types_livace.reference
@@ -0,0 +1,2 @@
+[(123,456),(789,234)]	[(567,890)]
+[]	[(11,22),(33,44),(55,66)]
diff --git a/tests/queries/0_stateless/01255_geo_types_livace.sql b/tests/queries/0_stateless/01255_geo_types_livace.sql
new file mode 100644
index 00000000000..0838f0fa219
--- /dev/null
+++ b/tests/queries/0_stateless/01255_geo_types_livace.sql
@@ -0,0 +1,9 @@
+DROP TABLE IF EXISTS tutorial;
+create table tutorial ( inner_poly  Array(Tuple(Int32, Int32)), outer_poly  Array(Tuple(Int32, Int32)) ) engine = Log();
+
+SELECT * FROM tutorial;
+
+INSERT INTO tutorial VALUES ([(123, 456), (789, 234)], [(567, 890)]), ([], [(11, 22), (33, 44), (55, 66)]);
+SELECT * FROM tutorial;
+
+DROP TABLE tutorial;