Print Sheets - Combine Into One PDF

Hello,
I install latest version: pyRevit v4.8.14.24016. I am using Windows-11, Revit-2021. I need to print PDF’s from the different models linked into master model. For some reason when selecting linked models the option “Combine Into One PDF” is only available when the host model selected. If any linked model selected, “Combine Into One PDF” is turning halftone and not available to check. I can only print to separate pdf’s and not to combine pdf. Does anyone have a solution for this?