I used a simbrief FP for a LIMC-LIMJ flight with sid and star. Taxi guidance did not work; After LIMJ approach asked to switch to tower, CP did not change frequencies. I was hand flying the aircraft, so I landed without being able to change frequency manually. When off the the runway, I switched to tower frequency, yet no response to taxi to gate. I ended my flight at this point.
Except for these issues, the rest of the flight, including altitude instructions worked well.
I am still learning how to use this program, so excuse what might be oversights on my part.