Travel to nether realm X not completing

I traveled to nether realm 1575, defeated the boss, and exited. and the task did not turn green.
I went back to 1575, teleported out. No green.
I went to 1576, teleported out. No green.

Fixed in latest patch as of now.

The task completes upon revisiting a boss floor. Not when I travel to the boss floor / defeat the boss.