deanote666
Member
Are you sure it's someone in your party? You can check what medals current party members are sharing on the Home screen. If there's nothing there, then it was a random pull from a member outside your party. If you level-upped recently that may explain why it won't show anymore, as what gets pulled is reflected by what level you are (I think).
That or the member in question just changed their share medal.
I haven't leveled up today and their medal was available earlier today. I was able to borrow it earlier with somewhat reliability.
Under home - > party, it still shows them as sharing it...