diff --git a/npm/ng-packs/packages/core/src/lib/directives/table-sort.directive.ts b/npm/ng-packs/packages/core/src/lib/directives/table-sort.directive.ts
index 707f2ab6ef..e9a58fe589 100644
--- a/npm/ng-packs/packages/core/src/lib/directives/table-sort.directive.ts
+++ b/npm/ng-packs/packages/core/src/lib/directives/table-sort.directive.ts
@@ -1,12 +1,11 @@
 import { Directive, Input, Optional, Self, SimpleChanges, OnChanges } from '@angular/core';
 import { Table } from 'primeng/table';
 import { SortPipe, SortOrder } from '../pipes/sort.pipe';
-
+import clone from 'just-clone';
 export interface TableSortOptions {
   key: string;
   order: SortOrder;
 }
-
 @Directive({
   selector: '[abpTableSort]',
   providers: [SortPipe],
@@ -14,16 +13,13 @@ export interface TableSortOptions {
 export class TableSortDirective implements OnChanges {
   @Input()
   abpTableSort: TableSortOptions;
-
   @Input()
   value: any[] = [];
-
   constructor(@Optional() @Self() private table: Table, private sortPipe: SortPipe) {}
-
   ngOnChanges({ value, abpTableSort }: SimpleChanges) {
     if (value || abpTableSort) {
       this.abpTableSort = this.abpTableSort || ({} as TableSortOptions);
-      this.table.value = this.sortPipe.transform(this.value, this.abpTableSort.order, this.abpTableSort.key);
+      this.table.value = this.sortPipe.transform(clone(this.value), this.abpTableSort.order, this.abpTableSort.key);
     }
   }
 }
diff --git a/npm/ng-packs/packages/core/src/lib/pipes/sort.pipe.ts b/npm/ng-packs/packages/core/src/lib/pipes/sort.pipe.ts
index d31d4903c6..ea23da1efc 100644
--- a/npm/ng-packs/packages/core/src/lib/pipes/sort.pipe.ts
+++ b/npm/ng-packs/packages/core/src/lib/pipes/sort.pipe.ts
@@ -1,29 +1,32 @@
-import { Pipe, PipeTransform, Injectable } from '@angular/core';
-import clone from 'just-clone';
-
+import { Injectable, Pipe, PipeTransform } from '@angular/core';
 export type SortOrder = 'asc' | 'desc';
-
 @Injectable()
 @Pipe({
   name: 'abpSort',
 })
 export class SortPipe implements PipeTransform {
-  intialValue: any[];
-
   transform(value: any[], sortOrder: SortOrder | string = 'asc', sortKey?: string): any {
     sortOrder = sortOrder && (sortOrder.toLowerCase() as any);
 
-    if (!this.intialValue) this.intialValue = clone(value);
+    if (!value || (sortOrder !== 'asc' && sortOrder !== 'desc')) return value;
 
-    if (!value || (sortOrder !== 'asc' && sortOrder !== 'desc')) return this.intialValue;
+    let numberArray = [];
+    let stringArray = [];
 
-    let sorted;
     if (!sortKey) {
-      sorted = value.sort();
+      numberArray = value.filter(item => typeof item === 'number').sort();
+      stringArray = value.filter(item => typeof item === 'string').sort();
     } else {
-      sorted = value.sort((a, b) => (a[sortKey] < b[sortKey] ? -1 : a[sortKey] > b[sortKey] ? 1 : 0));
+      numberArray = value.filter(item => typeof item[sortKey] === 'number').sort((a, b) => a[sortKey] - b[sortKey]);
+      stringArray = value
+        .filter(item => typeof item[sortKey] === 'string')
+        .sort((a, b) => {
+          if (a[sortKey] < b[sortKey]) return -1;
+          else if (a[sortKey] > b[sortKey]) return 1;
+          else return 0;
+        });
     }
-
+    const sorted = numberArray.concat(stringArray);
     return sortOrder === 'asc' ? sorted : sorted.reverse();
   }
 }
diff --git a/npm/ng-packs/packages/core/src/lib/tests/sort.pipe.spec.ts b/npm/ng-packs/packages/core/src/lib/tests/sort.pipe.spec.ts
new file mode 100644
index 0000000000..8428515118
--- /dev/null
+++ b/npm/ng-packs/packages/core/src/lib/tests/sort.pipe.spec.ts
@@ -0,0 +1,30 @@
+import { createServiceFactory, SpectatorService } from '@ngneat/spectator/jest';
+import { SortPipe } from '../pipes/sort.pipe';
+
+describe('SortPipe', () => {
+  let pipe: SortPipe;
+  let spectator: SpectatorService<SortPipe>;
+  const createService = createServiceFactory(SortPipe);
+
+  beforeEach(() => {
+    spectator = createService();
+    pipe = spectator.service;
+  });
+
+  test('should sort array in ascending and descending orders', () => {
+    expect(pipe.transform([5, 'b', 1, 'a'], 'asc')).toEqual([1, 5, 'a', 'b']);
+    expect(pipe.transform([5, 'b', 1, 'a'], 'desc')).toEqual(['b', 'a', 5, 1]);
+  });
+
+  test('should sort object array in given order with given key', () => {
+    const array = [{ key: 5 }, { key: 'b' }, { key: 1 }, { key: 'a' }];
+
+    expect(pipe.transform(array, 'asc', 'key')).toEqual([{ key: 1 }, { key: 5 }, { key: 'a' }, { key: 'b' }]);
+    expect(pipe.transform(array, 'desc', 'key')).toEqual([{ key: 'b' }, { key: 'a' }, { key: 5 }, { key: 1 }]);
+  });
+
+  test('should require an array as value', () => {
+    expect(pipe.transform(null)).toBeFalsy();
+    expect(pipe.transform(undefined, 'desc')).toBeFalsy();
+  });
+});
diff --git a/npm/ng-packs/packages/core/src/lib/tests/table-sort.directive.spec.ts b/npm/ng-packs/packages/core/src/lib/tests/table-sort.directive.spec.ts
new file mode 100644
index 0000000000..6a9401217e
--- /dev/null
+++ b/npm/ng-packs/packages/core/src/lib/tests/table-sort.directive.spec.ts
@@ -0,0 +1,27 @@
+import { SpectatorDirective, createDirectiveFactory } from '@ngneat/spectator/jest';
+import { TableSortDirective } from '../directives/table-sort.directive';
+import { TableModule, Table } from 'primeng/table';
+
+describe('TableSortDirective', () => {
+  let spectator: SpectatorDirective<TableSortDirective>;
+  let directive: TableSortDirective;
+  const createDirective = createDirectiveFactory({
+    directive: TableSortDirective,
+    imports: [TableModule],
+  });
+
+  beforeEach(() => {
+    spectator = createDirective(`<p-table [value]="[1,4,2]" [abpTableSort]="{ order: 'asc' }"></p-table>`);
+    directive = spectator.directive;
+  });
+
+  test('should be created', () => {
+    expect(directive).toBeTruthy();
+  });
+
+  test('should change table value', () => {
+    expect(directive.value).toEqual([1, 4, 2]);
+    const table = spectator.query(Table);
+    expect(table.value).toEqual([1, 2, 4]);
+  });
+});