I don't think High Pass should do this

[RichardMH]

Not an issue on the retail release. 

Edit. Its OK on other images. Hmm.

[EmT]

Hi @RichardMH

Could you provide a copy of that image so we can try to reproduce it? 
What happens when you do this on the retail build? 

[RichardMH]

The .aphoto file. This time it did  the same thing in the retail version. 

RMH04645-Iridient.afphoto

[EmT]

Hi @RichardMH
Thanks for providing your file, I have been able to replicate it and have passed it over to the devs for investigation. 

The issue occurs when a live Perspective filter is set below a Live High Pass filter in the layer stack like this:

In your file it looks like you've rasterized the pixel layer after the perspective filter has been applied, so if you set the Perspective filter in your file to be a child layer or hide it then you should be able to carry on without issues.