Hi guys,
Just had the same issue, after a few hours this is how i got past the “bug” after reading Djackdau.3190 last comment:
https://forum-en.gw2archive.eu/forum/support/bugs/freezing-in-Bramble-Walls
Enter and watch the cinematic, kill all enemies outside with the robot. After you’ve got the next cinematic (upon entering the courtyard) hit the ability that explodes yourself (key nr. 6) and continue the last part without the robot. When you’ve cleared the ground floor, follow the guards up the stairs to the left and run with them around the castle. (You may have to kill some undeads by yourself at the end)
Note:
- Dont die with the robot, for me it kept bugging then
- Try not to die in general, not sure if it matters (maybe someone can confirm?)
Hope this helps.