Spoke to Dan about this the other day but just making a bug report now.
We had a party of 3 for dreadhorn, all stood near the altar you get the keys from.
I was the party leader and got the 3 white keys from the altar.
I double clicked one of them, got the popup to confirm usage but clicked cancel, went and did something(about 30s) then clicked the key again and hit ok but I didn't get the popup to go over to the island on that character but the other 2 did.
I then gave a key to another party member and she clicked the key but hit cancel on the first popup due to a bit of confusion.
She used the key again and hit ok this time and only the third party member who never had a key or a popup shown to them got the ability to go over to the island which they did but no DH spawned.
We went and got the keys again straight after and went in successfully.
My only presumption is the 2 characters who clicked cancel at first had a flag against them that they didn't want to go, not that they just wanted to cancel using the key at that moment.
We had a party of 3 for dreadhorn, all stood near the altar you get the keys from.
I was the party leader and got the 3 white keys from the altar.
I double clicked one of them, got the popup to confirm usage but clicked cancel, went and did something(about 30s) then clicked the key again and hit ok but I didn't get the popup to go over to the island on that character but the other 2 did.
I then gave a key to another party member and she clicked the key but hit cancel on the first popup due to a bit of confusion.
She used the key again and hit ok this time and only the third party member who never had a key or a popup shown to them got the ability to go over to the island which they did but no DH spawned.
We went and got the keys again straight after and went in successfully.
My only presumption is the 2 characters who clicked cancel at first had a flag against them that they didn't want to go, not that they just wanted to cancel using the key at that moment.