First time poster, long time lurker. Is there any reason why upgrade to J would show as "not available" when there still are multiple seats left unsold? I'm 50k, flying YHZ-ICN via YYZ on a paid PY fare, with plenty of credits left to upgrade this trip. While I can put in upgrade request for YHZ-YYZ legs for both departure and return, YYZ-ICN legs are showing up as being unavailable--this was not the case when I checked last week. EF shows J4 for departure and J8 for return--R is zero, as usual. My departure is in a couple of weeks and my return about a week after that.
Wondering if there is some valid reason unknown to me that explains this or if it's a glitch and I should call in.