Noise in an image exported when resizing is used at a specific resolution

When I export an image in JPEG format and use resize with dimension max 1600px I get a grainy low quality result.

When I export an image in JPEG format and use resize with dimension max 1700px I get a no grainy output of good quality.

Overview of Mac OS is used in both cases. Display images with Adobe Photoshop has exactly the same result.

Lightroom 5.0 is used.

See screenshot below

Please advice.

Screen Shot 2014-05-11 at 17.52.50.png

This is a known bug in Lightroom 5

Upgrade to Lightroom 5.4

Tags: Photoshop Lightroom

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