Screenshot of the deadlock
Same bug, different instance
I was stress-testing my 4-way intersection, and my trains deadlocked in an unexpected way. You can see the north exit signal being locked on the yellow state even though the train going this way stopped moving. This results in that path being reserved, and that intersection being completely locked. Removing and replacing the north exit signal fixes the deadlock.Interestingly, all the instances I've had of this bug were with the same signal locking, even though the intersection is symmetrical. I'm not sure if this is just a coincidence or a side effect of the way my trains are routed, or if it is relevant to the bug.