diff --git a/CHANGELOG.md b/CHANGELOG.md
index 407d907..ddec9c3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,9 +1,15 @@
 # go-utils
 
+<a name="v1.42.1"></a>
+## [v1.42.1] - 2025-10-23
+### Fixes
+- remove side effect from map random ordering on FindDifferencesFromSlices
+
+
 <a name="v1.42.0"></a>
 ## [v1.42.0] - 2025-10-22
 ### New Features
-- identifier tanya
+- identifier tanya ([#72](https://github.com/kumparan/go-utils/issues/72))
 
 
 <a name="v1.41.0"></a>
@@ -213,9 +219,6 @@
 - fix marshal issue on gorm.DeletedAt empty value ([#32](https://github.com/kumparan/go-utils/issues/32))
 
 
-<a name="v.1.20.0"></a>
-## [v.1.20.0] - 2022-03-11
-
 <a name="v1.20.0"></a>
 ## [v1.20.0] - 2022-03-11
 ### New Features
@@ -315,11 +318,11 @@
 - add money formatter for multiple currencies ([#13](https://github.com/kumparan/go-utils/issues/13))
 
 
-<a name="v1.7.1"></a>
-## [v1.7.1] - 2020-12-10
-
 <a name="v1.8.0"></a>
 ## [v1.8.0] - 2020-12-10
+
+<a name="v1.7.1"></a>
+## [v1.7.1] - 2020-12-10
 ### New Features
 - add formatter for indonesian money and date
 
@@ -384,7 +387,8 @@
 - init go-utils
 
 
-[Unreleased]: https://github.com/kumparan/go-utils/compare/v1.42.0...HEAD
+[Unreleased]: https://github.com/kumparan/go-utils/compare/v1.42.1...HEAD
+[v1.42.1]: https://github.com/kumparan/go-utils/compare/v1.42.0...v1.42.1
 [v1.42.0]: https://github.com/kumparan/go-utils/compare/v1.41.0...v1.42.0
 [v1.41.0]: https://github.com/kumparan/go-utils/compare/v1.40.2...v1.41.0
 [v1.40.2]: https://github.com/kumparan/go-utils/compare/v1.40.1...v1.40.2
@@ -418,8 +422,7 @@
 [v1.23.0]: https://github.com/kumparan/go-utils/compare/v1.22.0...v1.23.0
 [v1.22.0]: https://github.com/kumparan/go-utils/compare/v1.21.0...v1.22.0
 [v1.21.0]: https://github.com/kumparan/go-utils/compare/v1.20.1...v1.21.0
-[v1.20.1]: https://github.com/kumparan/go-utils/compare/v.1.20.0...v1.20.1
-[v.1.20.0]: https://github.com/kumparan/go-utils/compare/v1.20.0...v.1.20.0
+[v1.20.1]: https://github.com/kumparan/go-utils/compare/v1.20.0...v1.20.1
 [v1.20.0]: https://github.com/kumparan/go-utils/compare/v1.19.3...v1.20.0
 [v1.19.3]: https://github.com/kumparan/go-utils/compare/v1.19.2...v1.19.3
 [v1.19.2]: https://github.com/kumparan/go-utils/compare/v1.19.1...v1.19.2
@@ -436,9 +439,9 @@
 [v1.12.0]: https://github.com/kumparan/go-utils/compare/v1.11.0...v1.12.0
 [v1.11.0]: https://github.com/kumparan/go-utils/compare/v1.10.0...v1.11.0
 [v1.10.0]: https://github.com/kumparan/go-utils/compare/v1.9.0...v1.10.0
-[v1.9.0]: https://github.com/kumparan/go-utils/compare/v1.7.1...v1.9.0
-[v1.7.1]: https://github.com/kumparan/go-utils/compare/v1.8.0...v1.7.1
-[v1.8.0]: https://github.com/kumparan/go-utils/compare/v1.7.0...v1.8.0
+[v1.9.0]: https://github.com/kumparan/go-utils/compare/v1.8.0...v1.9.0
+[v1.8.0]: https://github.com/kumparan/go-utils/compare/v1.7.1...v1.8.0
+[v1.7.1]: https://github.com/kumparan/go-utils/compare/v1.7.0...v1.7.1
 [v1.7.0]: https://github.com/kumparan/go-utils/compare/v1.6.0...v1.7.0
 [v1.6.0]: https://github.com/kumparan/go-utils/compare/v1.5.0...v1.6.0
 [v1.5.0]: https://github.com/kumparan/go-utils/compare/v1.4.0...v1.5.0
diff --git a/slice.go b/slice.go
index b44e9c4..2265f36 100644
--- a/slice.go
+++ b/slice.go
@@ -165,6 +165,7 @@ func FindDifferencesFromSlices[T comparable](slices ...[]T) []T {
 		return nil
 	}
 
+	var allItems []T
 	itemCountMap := map[T]int{}
 	for _, slice := range slices {
 		handledItem := map[T]bool{}
@@ -172,11 +173,15 @@ func FindDifferencesFromSlices[T comparable](slices ...[]T) []T {
 			// handle duplicate item in one slice
 			if !handledItem[item] {
 				itemCountMap[item]++
+				allItems = append(allItems, item)
+				handledItem[item] = true
 			}
 		}
 	}
+	allItems = Unique(allItems)
 	var result []T
-	for item, count := range itemCountMap {
+	for _, item := range allItems {
+		count := itemCountMap[item]
 		if count < len(slices) {
 			result = append(result, item)
 		}
diff --git a/slice_test.go b/slice_test.go
index 7a1ed15..83f9cd5 100644
--- a/slice_test.go
+++ b/slice_test.go
@@ -134,6 +134,14 @@ func Test_FindDifferencesFromSlices(t *testing.T) {
 			},
 			result: nil,
 		},
+		{
+			slices: [][]string{
+				{"b", "a", "c"},
+				{"a", "c", "d"},
+				{"e", "f", "a", "b"},
+			},
+			result: []string{"b", "d", "e", "f"},
+		},
 	}
 
 	for _, tc := range testCases {