Saving a ZenUML as PNG or SVG does not work

[Katze719]

Describe the bug
When i want to save my ZenUML diagram as a PNG or SVG file, it looks glitched, the online viewer shows it correctly

To Reproduce
Link to Live Editor:
Link

Steps to reproduce the behavior:

1. Enter this code into the live editor:

zenuml
title Order Processing

Client->OrderService.processOrder(orderId int) {
    InventoryService.checkStock(productId int) {
        if(stockAvailable) {
            return true
        } else {
            return false

            // Frühzeitiger Return
            @return
            OrderService->Client: Order out of stock (orderId int)
        }
    }
    PaymentService.processPayment(orderId int, amount float) {
        if(paymentSuccess) {
            return "Payment confirmed"
        } else {
            return "Payment failed"

            // Frühzeitiger Return
            @return
            OrderService->Client: Order failed due to payment issue
        }
    }
    return "Order processed successfully"
}

2. try to save as PNG or SVG and take a look at the picture

Expected behavior
PNG or SVG should look like this:

Screenshots
but it looks like this:

Desktop (please complete the following information):

• OS: Windows 10
• Browser edge 129.0.2792.89
• Version v11.3.0