I want to say up front that this issue isn't (necessarily) Adobe's fault, as it's clearly an issue with Pantone's ACB color book datbase file.
This is specific to the Pantone Solid Coated & Uncoated V4 ACB color book files. They were exported with the (no longer available) Pantone Color Manager app.
In any file in Photoshop, in the Channels panel, choose "New Spot Color." From Color Libraries, choose the Pantone Solid Coated (or Uncoated) V4 color book. Type in "Rhodamine" to select Rhodamine Red. Before you even click "OK," take a look at the Channels panel — it will list Rubine Red. You literally cannot select it.
The Pantone libraries (formerly) distributed by Adobe (the Pantone+ series and the older, lowercase versions) do not have this issue.
I'm posting this here because this issue would not exist if Photoshop was not dependent upon maintaining a live reference to an installed ACB color database file for spot channels chosen from that book.
InDesign and Illustrator do not have this issue, as they do not have the same issues with referencing colors from a live color book file.
TPinkerton • Adobe Employee, Oct 24, 2022Oct 24, 2022
Your request about improving the way we internally reference these colors is well taken. It will become even more important as we transition to new, external systems for selecting these colors. I'll look into it and see if we can address it. You are quite correct that the strict binding we currently have to our ACB files is too restrictive. We need a better, more generalized system.