Curves adjustment problem

[Don C]

I am not sure how to describe this problem, so my apologies if it has already been addressed somewhere.  I tried searching but couldn't find anything.

I have a new HP laptop, with Affinity Photo 1.10 installed, and when I try to make a curves adjustment, the image gets distorted as shown in the image below.  Any help on why this is happening and what can be done to correct it would be appreciated.

 

[GarryP]

It is often useful, when showing us a problem after something has been done and the result is unexpected, if you give us both the ‘before’ and ‘after’ so we can see what you started with in relation to what you got.
Otherwise it’s difficult to understand what’s happened in the transition from one state to another.

[Don C]

Here is the original photo, before trying to do a curves adjustment.

[PaulEC]

It would probably be easier to tell what is going on if we had the original photo (if possible), rather than a screen grab of it.

Does it happen on other photos, or only on this one? 

[Don C]

It happens on every photo.  Weird thing too is it only happens with normal blend mode.  Other blend modes like 'Lighten' have no issues.  I will attach one of my own original photos that this happens with (the one of the girl was from a lesson I was taking.)

[carl123]

Try...

Go into Edit > Preferences > Performance and switch off Hardware Acceleration if it's on

It does some weird stuff sometimes

[Don C]

Thank you carl123!!!  That fixed it.  I really appreciate you taking the time to help!

And thanks to PaulEC and GarryP too!