Bug fix

https://github.com/2dust/v2rayNG/issues/5186

V2rayNG/app/src/main/java/com/v2ray/ang/ui/GroupPagerAdapter.kt

@@ -11,6 +11,8 @@ import com.v2ray.ang.dto.GroupMapItem
 class GroupPagerAdapter(activity: FragmentActivity, var groups: List<GroupMapItem>) : FragmentStateAdapter(activity) {
     override fun getItemCount(): Int = groups.size
     override fun createFragment(position: Int) = GroupServerFragment.newInstance(groups[position].id)
+    override fun getItemId(position: Int): Long = groups[position].id.hashCode().toLong()
+    override fun containsItem(itemId: Long): Boolean = groups.any { it.id.hashCode().toLong() == itemId }
 
     @SuppressLint("NotifyDataSetChanged")
     fun update(groups: List<GroupMapItem>) {