Hey Kristof,
Thanks for your question! We have been making improvements to SVG handling and continue to do so. Our latest updates to the SDK provide better support for statically uploaded SVGs. You can also try adding your SVG with a custom code block. In your case though the SVG images in your symbol are dynamic. If our built-in component is not working well for your use case it would be better to create a custom component in your react code to render dynamic SVGs at this time.
Best,
AJ