Objective has you going in circles.

[OldSchool SC Fight Club]

Payphone mission in rikti warzone. "Access the Matrix" when in AE in this mission. Once you get the tablet, it wants you to go somewhere but the marker just has you going in and out of the same door. There are no objects to interact with. Had to abandon.

[Rudra]

That's a door bug. Happens randomly/occasionally when you are inside and you get a waypoint outside. However, if you look at your map instead of the waypoint, the map should have the correct marker location. And if you were to state what the objective was, I could help you with finding it. The mission itself does not have you going in circles. (Well, it does, but not the way you were stuck.)