Hey there,
I have been watching the functionality of the Reach Gate in Bangkorai for several updates long ever since The Reach came out as a playable dlc. I've always wanted all the zones to be interconnected as in Elder Scrolls: Arena.
As response to an old thread asking for the Bangkorai's gate to connect to the Reach, a cart was placed in front of the gate which was supposed to connect both zones to each other.
However, because my main character already completed the "Jackdaw Cove" questline in the area, which cause you to be instanced upon completing. The cart breaks in this particular instance, and won't be functional. I tested this with another character that didn't complete "Jackdaw Cove", and he was able to use the cart like it's supposed to.
My main (has completed "Jackdaw Cove"):
Another character (hasn't completed "Jackdaw Cove"):
I tested this on PTS
I'm glad to have found more info on this particular issue, and hope it will be fixed in the future