Recently a user told me they couldn't see any conditional formatting in your dashboard (Table Objet), but when I log in, it works perfectly.
I created a new user account for test, I shared the report with the same role and the formatting was visible OK, but after a few hours it stopped working again!
Older versions of the same report work fine for that user, but the newest one doesn't. (There are no differences in the table display properties or presentation options).
I think it might be a role-related problem, but I can't find a solution.