Issue with Dashed Lines in Mermaid Flowchart

[jongwooo]

flowchart TD
    GatewayClass["GatewayClass<br>foo-com-external-gateway-class"]
    Gateway["Gateway<br>default/demo-gateway-1"]
    Namespace["Namespace<br>default"]
    Service["Service<br>default/demo-svc"]
    HTTPRoute1["HTTPRoute<br>default/demo-httproute-1"]
    HTTPRoute2["HTTPRoute<br>default/demo-httproute-2"]
    HTTPRoute3["HTTPRoute<br>default/demo-httproute-3"]
    HTTPRoute4["HTTPRoute<br>ns2/demo-httproute-4"]

    GatewayClass --> |GatewayClass| Gateway
    Gateway -.- |Namespace| Namespace
    Namespace -.- |Namespace| HTTPRoute1
    Namespace -.- |Namespace| HTTPRoute2
    Namespace -.- |Namespace| HTTPRoute3
    Namespace -.- |Namespace| HTTPRoute4
    HTTPRoute1 --> |BackendRef| Service
    HTTPRoute2 --> |BackendRef| Service
    HTTPRoute3 --> |BackendRef| Service
    HTTPRoute4 --> |BackendRef| Service
    HTTPRoute1 --> |ParentRef| Gateway
    HTTPRoute2 --> |ParentRef| Gateway
    HTTPRoute3 --> |ParentRef| Gateway
    HTTPRoute4 --> |ParentRef| Gateway

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I expected the following connections to appear as dashed lines (without arrowheads), but they are displayed as dashed arrows (with arrowheads) instead:

Gateway -.- |Namespace| Namespace
Namespace -.- |Namespace| HTTPRoute1
Namespace -.- |Namespace| HTTPRoute2
Namespace -.- |Namespace| HTTPRoute3
Namespace -.- |Namespace| HTTPRoute4

Is there a way to ensure that these connections are rendered as dashed lines (without arrowheads) rather than dashed arrows? If this behavior is a limitation or bug, please provide clarification or a workaround.

Thank you!