If you use Gigapixel as PS plugin, when you save the upscaling as a layer on PS, Gigapixel is forcing the conversion of the origin color space to sRGB.
This ruined almost 2 months of preparation work for an exhibit I’m working on, and you can’t even imagine how frustrated I feel.
I read on the forum that this bug was discovered at least on version 4.x, so I really don’t understand why it was not fixed.
Using PhotoAI is not a solution, first because there is no plug-in for upscaling, and then because even the standalone app is bugged in the usocale on the current version (1.5.3, bug reported in the appropriate section)