Deprecated Darkstar fourms

I haven't had this happen to me, and I have yet to hear anything that confirms it one way or another, but I've heard mumblings that people have lost their airship/chocobo passes for seemingly no reason. Basically, I'm looking for hard data instead of "that happened to a friend of a friend of a friend on the night of the full moon..."

At first I chalked it up to keyitem IDs possibly changing, but they're still correct, which I decided to check tonight.

I'm not too worried about servers where they're given out by an NPC and players saying "I didn't get mine." That could be a scripting error. I'm more interested in any reports of "I used to have one, but now I don't," especially if you remember what you did recently as far as quests, NPCs, or mob kills.

It has happened to me and to several others playing on viper's server (where we had the key items for airship pass/airship pass to kazham/chocobo license and then they disappeared). I feel like it usually happens after a server crash. After logging out or disconnecting myself and coming back a few times, they will eventually reappear.