The lack of a T/D and a descent profile like you describe is a bug. It happens with some STAR/TRANS, but not all. When this happens, I either select a new STAR (sometimes fixes it) or I have to try a little trick of copying a waypoint, into the scratchpad, from within the STAR or TRANS and then pasting it over the previous waypoint. Then ERASE (DO NOT PRESS EXEC) the change, this will sometimes get a T/D and a descent profile. Sometimes I need to do this a few times (using different waypoints but still from within the STAR/TRANS) to get the T/D and descent profile. Other times, it just does not work at all.

If I cannot get it to work at all, I usually quit the flight or choose a new destination. AND. The ones that I can't get working are always the same ones. This means if I can't get the T/D to stick, I never will get it to stick for that particular ILS, STAR and TRANS. :(

I'm planning on doing a tutorial that covers the 757, 767 and 777, on how I do it.