Not long after East Coastway came out, players reported an issue where a queue of trains were stuck at red lights and nothing would move. Just now, I had it on Southeastern Highspeed driving a Class 395 between Faversham and London St Pancras, but I didn't even make it to Gravesend. I suspect the issue was a train in the sidings that was given a green light to join the mainline went down the wrong track and got stuck as shown below. This in turn, caused a queue of about 3-4 trains to get stuck at red lights including mine. I do not know if anyone else has had this problem, but this isn't the only issue I have had with this specific DLC today. I took over a service from an NPC at Sittingbourne to London Victoria on the Class 465 and the HUD on the upper left broke. I was unable to see where I was due to go next and had to keep referencing the pop up HUD with the list of calling points. I was able to arrive to Rochester with no further issues and the NPC took the train back and continued to London Victoria. Afterward, the HUD remained broken and I had to leave Southeastern Highspeed for it to work again.
