Trapped in a Mirage (Xbox One)

I went inside of a Mirage in "The Harvest" in Act 4, the mirage overlaps with the entrance to "Maligaro's Arena" so I went inside the arena. Once inside, I am trapped. Maligaro doesn't spawn because the mirage area doesn't overlap with his spawn area in the arena. The issue is that you MUST kill Maligaro for the entrance to his arena to open back up. This is also an issue because I cannot portal out, so I have to log out to leave the arena. This bug likely occurs with other boss arenas that have mirages near them, but do not fully overlap with where the boss itself spawns.

Although it may not be needed, I am playing on an original Xbox One, gamertag is "Deadwerd666", and my bug report reference number is 1,408,878,805.

If you encounter something like this again, you can probably get out by using the league mechanic shortcut (on PS this L2 + R2 + up, I'm sure it's similar on XBox).