Helix Rift bug. (Assassin's Creed: Syndicate)

In general, guys, this topic: I dive into the Helix rift, teleports me during the First World War, then the task follows - to find the second radio. And so, I find it and then I need to jump down from the window into the haystack and catch up with the ship and then it gives me "AC Syndicate stopped working."