diff --git a/tabbar-navigation/src/main/java/ru/touchin/roboswag/components/tabbarnavigation/BottomNavigationFragment.kt b/tabbar-navigation/src/main/java/ru/touchin/roboswag/components/tabbarnavigation/BottomNavigationFragment.kt
index 9e008be..c1364fc 100644
--- a/tabbar-navigation/src/main/java/ru/touchin/roboswag/components/tabbarnavigation/BottomNavigationFragment.kt
+++ b/tabbar-navigation/src/main/java/ru/touchin/roboswag/components/tabbarnavigation/BottomNavigationFragment.kt
@@ -76,7 +76,7 @@ abstract class BottomNavigationFragment : Fragment() {
 
     class TabData(
             val viewControllerClass: Class<out ViewController<*, *>>,
-            val viewControllerState: Parcelable,
+            viewControllerState: Parcelable,
             /**
              * It can be useful in some cases when it is necessary to create ViewController
              * with initial state every time when tab opens.
@@ -84,21 +84,34 @@ abstract class BottomNavigationFragment : Fragment() {
             val saveStateOnSwitching: Boolean = true
     ) {
 
+        /**
+         * It is value as class body property instead of value as constructor parameter to specify
+         * custom getter of this field which returns copy of Parcelable every time it be called.
+         * This is necessary to avoid modifying this value if it would be a value as constructor parameter
+         * and every getting of this value would return the same instance.
+         */
+        val viewControllerState = viewControllerState
+            get() = field.copy()
+
         operator fun component1() = viewControllerClass
 
         operator fun component2() = viewControllerState
 
         operator fun component3() = saveStateOnSwitching
 
-        private fun Parcelable.copy(): Parcelable {
-            val parcel = Parcel.obtain()
-            this.writeToParcel(parcel, 0)
-            parcel.setDataPosition(0)
-            val result = parcel.readParcelable<Parcelable>(Thread.currentThread().contextClassLoader)
-                    ?: throw IllegalStateException("It must not be null")
-            parcel.recycle()
-            return result
-        }
+        private fun Parcelable.copy(): Parcelable =
+                if (this is EmptyState) {
+                    EmptyState
+                } else {
+                    val parcel = Parcel.obtain()
+                    parcel.writeParcelable(this, 0)
+                    parcel.setDataPosition(0)
+                    val result = parcel.readParcelable<Parcelable>(
+                            javaClass.classLoader ?: Thread.currentThread().contextClassLoader
+                    ) ?: throw IllegalStateException("Failed to copy tab state")
+                    parcel.recycle()
+                    result
+                }
 
     }