Plugin PayPal Standard loose CurrentCustomer.Id

Hi,
In the PayPalStandardController the cancelorder methods loose the CurrentCustomer if you are already logged.
I test the plugin with my admin account (normally authenticated) but in case of cancel order _workContext.CurrentCustomer.Id contains a new Id of Customer.
For this reason SearchOrders does not works and I am unable to go to OrderDetails but always on HomePage.
We had the same issue in version 3.9 actaully in production in my case.
Any idea or solution?

public IActionResult CancelOrder()
        {
            var order = _orderService.SearchOrders(_storeContext.CurrentStore.Id,
                customerId: _workContext.CurrentCustomer.Id, pageSize: 1).FirstOrDefault();

            if (order != null)
                return RedirectToRoute("OrderDetails", new { orderId = order.Id });

            return RedirectToRoute("Homepage");
        }

Thanks in advance