Wrong Vnav guidance

[Adryxxx]

Hi, I was flying just this evening into Istanbul LTFM following the ERSEN1A arrival. That is quite a demanding STAR ad it has quite a lot of altitude and speed restrictions that forces you to fly below the econ descent path.
Basically the aircraft ignored all the speed and altitude restrictions and kept me way too high on approach. It seems like it calculated the descent path down to be at 5000 feet at the FAF (which is the correct altitude) like there were no altitude restriction whatsoever. So the profile would have been correct for the track miles flown if there were no restrictions.
Is it a common issue or is this something spurious?

Edited June 30 by Adryxxx
Wrong title

[Liamr685]

A few of us have had similar, where it draws the vertical profile wrong and has you either too high, or too low on the STAR.

[foliainfx]

10 hours ago, Adryxxx said:

Hi, I was flying just this evening into Istanbul LTFM following the ERSEN1A arrival. That is quite a demanding STAR ad it has quite a lot of altitude and speed restrictions that forces you to fly below the econ descent path.
Basically the aircraft ignored all the speed and altitude restrictions and kept me way too high on approach. It seems like it calculated the descent path down to be at 5000 feet at the FAF (which is the correct altitude) like there were no altitude restriction whatsoever. So the profile would have been correct for the track miles flown if there were no restrictions.
Is it a common issue or is this something spurious?

The A350 VNAV from ini is currently very flawed. It has many issues like constraint handling, FMA modes, etc.