I love and hate this game, all at once

I am in WT3, and just beat the the Invaded Capital Hill mission, solo. but the God damned door to let me leave the building to finish the mission, wouldn't open. I tried killing myself, I tried FTing to the start of the mission, (like you could the TD), and nothing worked. I was stuck in that last area. And when I traveled to the checkpoint, just outside the area, the mission reset itself. I thought those door glitches were fixed, after the Open beta?