Image quality downgraded to 96dpi Problem

Hi. Thanks for creating this great plugin.
I am having one issue with it.. when I watermark a jpg (300dpi) with a transparent png (300dpi) the watermarking process downgrades the created file to 96dpi.

I have ensured that the quality slider is 100%.
Is there any fix available for this?

Thanks,
Gareth

https://www.ads-software.com/plugins/image-watermark/