So I think either shoulders are not dropping at all, or they have a really low droprate in comparison to any other undaunted style pages. You can still buy it straight for 50 keys, but I'm speaking about the drop chance they have in blue mystery boxes.

There have been two threads reporting this issue already, one started by me out of doubt, another started by another user.
I asked in discord and in game guilds about this and some people had similar experiences, I asked them to check forums.
People have spent from 60-150 keys to get a shoulder style page. Bad luck usually was something like 30-40, but around 100 is unprecedented.

Since we're at it, I've yet to seen a mask page, either on guild stores, on zonechat, or in a run I've done. I've done only 5 runs or so, but none of my friends/guildies have seen it anyway, and I'd say we may have done around 30-40 different runs combined.

I'm going to apply for a key refund, because I just sank most of my reserves of keys into this and it feels frustrating to lose around 80 keys for a a bug; but some clarification would be appreciated.