Hello,

i noticed some strange behaviour of the Book Preflight panel. While it shows the current working preflight profile as selected, it will instead use InDesigns [Basic] preflight profile. To actually use your desired preflight profile, you have to open the list of profiles and select it (again). Even though it already shows as selected.

To reproduce this error, i duplicated the [Basic] preflight profile, named it "Test Check" and additionally disallowed RGB color under COLOR > Color Spaces and Modes Not Allowed > RGB. I then selected it as working profile in the preflight settings.

I then set up a 4 page book file, consisting of 4 seperate InDesign documents, one of them containing an RGB filled object. When i open the books preflight panel, it shows the previously set up working profile as a selected, but won't use it. It will use InDesigns [Basic] profile, which doesn't contain the RGB color check. So the documents all finish checking with no errors.

Only when i open the books preflight panel a second time, the actually used [Basic] profile shows up as selected. And when i select my actually desired profile, the check finishes as expected.

Some additional notes for the first "phase", when my working profile shows up wrongly as selected:

I can click the (already activated) radio button next to it and suddenly the [Basic] profile will show up.

If i didn't do the above step, i can use the profile drop down and select my (already selected) working profile, and then InDesign will actually use it.

Link to my test files:
https://www.dropbox.com/s/11svsbbmvawdtt2/Book%20Preflight%20Test.zip?st=t042y5tm&dl=0

This isn't a new error, by the way. I encountered first in InDesign 2022. I just upgraded to 2025, this time without importing any previous preferences, so i'm now sure this is an actual bug.