Connection arrows in exported SVG not shown in Draw/Visio


i exported *.bpmn digrams as SVG.
If I open them in e.g. internet explorer all is fine. The Graphic is shown correctly.

But if I open the *.svg files created with camunda modeler in MS Visio or LibreOffice Draw the connector arrows (start and end point of the connector line) dissappeared.

Whats wrong?

These tools do not seem to be SVG 1.1 compatible. We are using markers for connection starts / ends and the tool importing it should support it. As an example, Inkscape is a fully compatible SVG editor.