Basically I have the same problem as in the closed thread \pdfmarkupcomment works in MWE, but doesn't work in my thesis.
Simple MWE, even longer files work fine, the text gets highlighted as it is supposed to.
My main paper consists out of several .tex-files (in different subdirectories) that get included (or not) depending on boolean variables.
Wheras other pdfcomment-commands work fine, the
pdfmarkupcomment does not work at all.
Anybody seen something similar?