Adjustment layer incorrectly exporting - exported image looks different to image in workspace

I am having difficulties exporting my work in that the resulting exported image is different to the image in the workspace.  Specifically, the problem is with a particular layer that is composed of a clipping mask with an associated colorized Hue/Saturation layer at 50% opacity - please see this image:

^ this is the work as it appears in the workspace.  The layer in question is the hills in the background of the image: in the workspace they are a purple mauve colour.  However, when I export, the hills layer changes colour to a blue colour:

^ this is the resulting exported image with the incorrect coloration.  Does anyone have any idea why this is happening?

For reference, here are screenshots of my exporting options (notice how in the 'Export As' dialogue box the hills are the wrong colour) -

^PNG

^ JPEG 

If I do 'Quick Export as PNG' I get the same problem.

Here is a screenshot of the layer:

Any help would be greatly appreciated.

I am using Photoshop 2021 and these are the specs of my laptop:

MacBook Air (13-inch, Early 2015)

Processor: 1.6 GHz Intel Core i5

Memory: 4 GB 1600 MHz DDR3

Graphics: Intel HD Graphics 6000 1536 MB