Any ideas what is causing this?
First I would like to emphasize that Cathay Pacific is an english managed company! This is important to know if your mother tongue is not english or if you have not grown up in a commonwealth state or in a former british colony. There is a lot of adaptation required. People from commonwealth states may have fewer difficulties to adapt to the system, but the following applies irrespective of that.
There seem to be no problems at the mainline.
N_D