How to specify non relative url for saving file?

[mnvx]

I try to specify specify url for saving file:

<iframe src="{{ url_for(
        'static',
        filename='daxe/daxe.html',
        config='config/gost_config.xml',
        file='/documenteditordaxe/2?document_version_id=44&random_workaround=0.6865005110307894',,
        save='/test-save'
    ) }}" class="editor-frame"></iframe>
</div>

Iframe loads data from

Request URL: http://127.0.0.1:5001/static/daxe/daxe.html?config=config%2Fgost_config.xml&file=%2Fdocumenteditordaxe%2F2%3Fdocument_version_id%3D44%26random_workaround%3D0.6865005110307894&save=%2Ftest-save

file loads from url

Request URL: http://127.0.0.1:5001/documenteditordaxe/2?document_version_id=44&random_workaround=0.6865005110307894&random_workaround=0.594691556483665

But when I click to save button, request going to page http://127.0.0.1:5001/static/daxe/%2Ftest-save instead of http://127.0.0.1:5001/test-save

Is any way to specify non relative url for save?