Export in PDF ruin the quality

Hello,

So i worked on some project for work, and i realized that since the last update, the quality of PDF export is worse.

Like i did an emailing with a logo before the update and on the PDF it's super sharp, but if i export the same file now the logo seems blurry or cut somehow, when everything else is sharp (color blocs, texts, etc)

I was hoping someone would have a fix or an idea i could try ? 

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I tried to export it in jpeg 100% quality and the x2 is really good, but then when i turn it into a pdf it's super pixelated, so that's not really a solution.

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Thank you for your help and have a good day !