I completed the Warrens quest, and received the update in my Quest log that I should inform Isaac. So I do, and he's happy (as usual), so he tells me he has a gift, and to come back later. Usually, that means 'walk out into the alley and back in again', and he'll give you the gift. But this time, the only dialogue options were to ask him the same questions again, or tell him about where the Gargoyle came from. The usual option, "Do you have that gift?" just isn't there. My quest log updated, to show that Isaac did indeed promise a gift, but I can't claim it.
I thought maybe you just altered it so that we actually had to come back later, so I proceeded to Chinatown. After the Fu Syndicate quest, I went back to Hollywood to see if Isaac would offer his gift, but again there was no dialogue choice to even ask about it.
