AMD issued a patch driver Q18.4.1 that corrected 10 bit color issues in photoshop. The latest driver Q19.1 breaks 10 bit per pixel color on my windows 10 WX7100. There is no longer a setting in the advance settings to enable 10 bit pixel format support. Reverted back to Q18.4.1, and 10 bit support returns.
The release notes indicate the newest driver fixes the 10 bit issues. In my case, it eliminated the option to enable it.
