Difference Between Affinity Main Window Display and Export on Mac i9 w/Radeon 5500M

[AN 2x4]

 

Images displayed in Affinity 2 (2.0.3 and 2.1.0) appear to have a different exposure/contrast than when exported. Oddly though, a screen shot of the export preview against the main Affinity window does not show the difference - they both look like the export.
 

The problem is everything I'm working on looks different when exported. I feel like I've seen this problem before, but the last few batches of images didn't have this issue.

This is a video from my phone that shows what I'm seeing in the main Affinity window vs what exports. Also, I have noticed that when the file opens is looks more like the export, but slowly transforms to what I'm used to seeing.

Video showing difference

Originally from RAW format using serif engine. Using Apple engine produced more similar but still different results.

I've attached a screenshot of my Affinity main window, export window and a screenshot of both of them - all look like the export except the main window. 

Affinity2 Main vs Export.HEIC

 

Images are from Lumix GX85 RAW (.rw2) developed with Serif engine. Primarily version 2.1.0, but I reinstalled 2.0.3 and saw the same problem.

 

Is this a bug or am I missing some setting? Thanks

[lepr]

You have a HDR Affinity document. JPEG supports only SDR imagery, therefore the higher intensity colour component values of the document are being clipped when exported.

Because your display is HDR-capable and 'Enable EDR' is ticked in the 32-bit Preview panel, HDR values (or at least some of them) are being displayed without clipping and so the document view differs from the JPEG export preview and the actual export.

If you clear the tick for 'Enable EDR' in the 32-bit Preview panel, you'll see the document clipped to SDR, just like the export preview and the actual export.

[AN 2x4]

Thank you! I thought I'd tried that but didn't see the transformation I was expecting. I figured it was something like that.