Cliffside
The issue with the gate still being closed is something I’ve encountered before, and well before the fix to the end boss. It seems to happen when the seals aren’t actually broken. Visually they’re destroyed but for some reason they still have a small amount of health left. This issue is rare but it still occasionally happens. The only workaround I’ve found is to restart the entire fractal run. This really sucks if you’re on the third fractal and you can’t get to the last boss because of a gate not opening correctly.