I haven’t used a DCS file in more than 10 years and I had no idea InDesign would do that.
Gotta ask…why are you using them.
Legacy workflow and PDF Image replacement with Xinet.
We're building varnishes directly into files.
Might be solved with TIFF plus spot channels or .PSD.
Still doesn't fix the package issue!
I tried a 5-color PSD file and it packaged and separated correctly.