LINQ - See if property value exists in another collection with same property value?

Perhaps I'm overthinking this? I'm trying to find a way to use the classic WPF filter logic, and I'm adding onto it to hide/show any items that contain the errors that are checked/unchecked.

private void viewSource_Filter(object sender, FilterEventArgs e)
        {
            var typeCheck = e.Item.GetType().ToString();
            if (e.Item.GetType().ToString() == "Client_Invoice_Auditor.CoreClientAR.dailyAccountBalance")
            {
                dailyAccountBalance DAB = (dailyAccountBalance)e.Item;

                int count = errorFilters.Where(w => w.IsChecked).Count(w => DAB.Errors.Contains(w.Item));

                if (count == 0)
                {
                    DAB.Visibility = "Collapsed";
                    var toHideDAB = DABView.Items.GetItemAt(DAB.RowIndex);
                    TreeViewItem hideItemDAB = DABView.ItemContainerGenerator.ContainerFromItem(toHideDAB)
                    as TreeViewItem;
                    if(hideItemDAB != null)
                        hideItemDAB.Visibility = Visibility.Collapsed;
                    e.Accepted = false;
                    return;
                }

                DAB.Visibility = "Visible";
                var toShowDAB = DABView.Items.GetItemAt(DAB.RowIndex);
                TreeViewItem showItemDAB = DABView.ItemContainerGenerator.ContainerFromItem(toShowDAB)
                as TreeViewItem;
                if(showItemDAB != null)
                    showItemDAB.Visibility = Visibility.Visible;
                e.Accepted = true;
            }
        }

Right now, this code doesn't work perfectly - only some of the qualifying items will disappear, only to never re-appear again.

I can give more code if needed. Can anyone provide alternate suggestions? I know I have the concept of showing/hiding the treeview item down, it's just a matter of matching the filter...