Crusader's citadel spawns on mesa in inaccesable spot in mirage

In the middle of arena theres the portal to baran in the mirage but the problem is that theres this huge inaccesable area so theres no way to go in, i tried few times to click it but unfortunately i cant enter it.
Not sure if its a bug or just intended from the mirage mechanic to sometimes cut in like that and make it impossible to go into the boss arena.
Bug Report ID: #11 313 218