Proxified CNAME has wrong Content-Type headers

Hey there, I'm facing issues with my CNAME. It shows wrong Content-Type for my images (SVG/PNG) leading to them not showing.
This is working just fine when disabling the proxy.

I've investigated and I have no workers, no rules, nothing but this proxified CNAME.
Could it be possible that the CF proxy drops the Content-Type for some contents (SVG images in this case)?

Thanks a lot for your help! 🙂

EDIT: it's also breaking the header for CSS/JS files as well.
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