昨天在群里看到有个玩家，九阶刷新的是八阶礼包，以为是BUG，官方论坛昨天发了公告，今天特地告诉小伙伴一下。
文章大意：你有百分之25的几率刷新在你竞技场下的礼包，如果你不喜欢的话第二天就会刷新，由于购买是一次性的，例如你购买了九阶礼包，以后肯定是不会刷新了，之后就会刷新其他竞技场礼包。
英文版本：
There's a 25% chance you'll see an Arena Pack from the Arena below your current Arena. This is for variety if you aren't interested in your current Arena's pack.
Arena Packs show up in your Shop on the first and second day when you unlock a new Arena, and then once a week thereafter. They're always one-time purchases, so if you've purchased the Arena 9 Pack, for example, you won't see it again.
This means that most players will see another Arena Pack tomorrow, which might be the same one as today if it wasn't purchased, or it might be from the Arena below. If you're in a higher Arena, you'll be offered all the Arena Packs over time.