Steam Stuck At Stratford International Red Light In 1l12 St Pancras International To St Pancras Internatio

Im in the schredules mode in Southeastern Highspeed (Complete), with the class 395 seb in 1L12 St Pancras International to St Pancras International 09:56/01:09.

I contacted the controller and got the message "denied, wait for the signal to change." There's no train ahead on the line. I tried to add a waypoint to the route but it says the location is unreachable.
I've arrived where I am following the planned route; I haven't made any changes.

I've been watching videos to see if there's any procedure I need to follow at this point, but I found one from a different service that passes through the same spot and it just has a green light. I don't know if it could be a bug or i missing something.

In this video at 31.17:
.

Does anyone know what's going on?
I reset the route and the same thing is happening again. -.-"

 

Edit: I tried deleting the route and creating a new one with a stop at St. Pancras, while stopped again in Stratford. This is the only way it let me through, but the scenario didn't complete. Could the problem be the route? I think the signal closes just before stopping at the Stratford platform, and that's when the speed limit on the screen turns red and displays "000".

 

Edit2: Its already reported like a bug to Dovetail Support.