I am reaching out to report a rendering issue we’ve encountered in Adobe Acrobat when viewing PDFs exported from Apple Keynote.

The issue arises when vector objects containing gradients—originally created in Adobe Illustrator—are copied into Keynote and then exported as PDF files. When these PDFs are opened in Adobe Acrobat (both Reader and Pro), the gradient elements frequently fail to render correctly. Specifically, we’ve observed:
Incomplete or missing rendering of gradient-based vector objects.

Flashing or flickering of large embedded images during zooming or panning.

This behavior does not occur in other PDF viewers such as macOS Preview, which suggests that the problem may be specific to Acrobat's rendering engine.

Since Adobe Illustrator and Acrobat are both part of the Adobe ecosystem, we had expected smoother compatibility, especially when working with Apple Keynote, which is widely used in the design community. We would appreciate your investigation into this matter, as it impacts presentation quality and client delivery.