notification issues in ios10.

I use wechat in ios10, In preference, I turn on notification on lock screen.

In wechat preference, I turn off "show detail in notification"

in iOS9, when new wechat message come in , it show "New wechat message", without any information about from who and content.

in iOS10, even message from that same person , sometimes, it show "[Name of myFriend] new wechat message",

and sometimes , it show "New wechat message"......

I have not try imessage,