I've also written a support ticket, this is more of a FYI to other players.
We did the Doomlore escort on NA IP 22.214.171.124 as the first Doomlore meta post daily reset. The event worked fine up to the point at which he steps into the misty bit where the escort ends. He stayed stuck on the path. There was no interaction talk, and no visible reason why he stopped moving.
I've not seen this bug before, and I do Doomlore pretty much daily.