@voxuer1 This'll most likely be some Windows rendering issue with JUCE. Probably not something Christoph is going to address himself, and it might not be addressable by the JUCE team either.
All said and done, you're almost certainly going to be much better off rendering out the exactly resolution you need, both in terms of memory efficiency, and also future proofing.
If you need to support different resolutions, and you can't just turn your SVG's into SVG paths using the Projucer SVG Path converter, then you should export your PNG at different scales and choose the right file to insert at runtime based on a global scale factor.