B/W images much darker after being exported in Affinity Photo?

[Viktste]

Hi. My first post, so thanks for very great value for money software 🙂

I have an issue when saving jpegs, they get a little darker after exported with affinity.

Example:

A grayscale gradient image:                                                                                 

The same image after opening in Affinity and exporting as jpeg:

 

Both images side by side in WIN10 photo viewer:

The Affinity saved one appears much darker.

The jpeg export settings: 

The affinity screen:

 

Windows 10 color management :

 

 

I use Affinity to put my signature on astrofotos, and find I loose a lot of details after they have been into Affinity.  

Does anyone have any idea what is causing this?

 

[NotMyFault]

Windows preview app does not support color profiles correctly. The file uses GREY/8. if you want to see it correctly with those app, export with sRGB profile.