See my post here:
I am sure that this is the same problem. Let me guess, you entered a STAR for RW28? This problem has been known for months now. Sadly nothing was ever done about it (probably because the hype is with the A350). The A330 has the exact same issue, by the way. So both planes are unflyable on VATSIM, if one plans to go into LSZH in the evening hours. A shame, really.