Locked in boss arena after killing boss(Maps)

Like the title says, I(chronomancer) killed the boss and the barrier to leaving the arena is still up. When the boss spawned I used time freeze and was able to kill the boss before it unfroze.

Skills used:
1.Spark
2.Orb of storm
Time Freeze- duration is 7.77s

Had this same bug, teleporting out to hideout, and using a portal back in, puts you back at the start of the map.
This way you can complete the map still.