Export flow to svg adds black objects

[louagej]

Hi,

I have a simple flow that when I export to svg it only generates a black square.
This is the flow:

flowchart
    subgraph Gloeier1
        gl1binin((GL1 BIN IN))
        gl1[[Gloeier 1]]
        gl1binout((GL1 BIN OUT))
        gl1binin -- start --> gl1
        gl1 -- stop --> gl1binout
    end

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this is the result exporting to svg: