Redshift Community

After slaughtering the end boss in my new playthrough at level 14, I was level 15. I went to HOL1 fairly confident of my ability to do this without leveling in the official expansion: Ice and Fire. Anyways, I killed off the Savirs in the battlements and left the city. Then, I went north to Savir HQ east of the city. I was instantly attacked by all manner of enemy and almost won. However, I retreated theough the northern gate hoping to set an ambush, and 2 things happened:
1- I was teleported through the southern side of the HQ
2- The remnants of my attackers dissapeared.
What happened and was it a glitch?