Empty third sensor position with OVRManager.tracker.GetPose(2)

TL;DL: With 3 sensors, OVRManager.tracker.GetPose(id) works OK for the first and second sensors (ids 0 and 1), but returns (0,0,0) for the third sensor (id 2).

Hello!
I'm working on an app that uses each sensor position, and it works correctly for the two first trackers, but not for the third one.

• OVRManager.tracker.count does return 3.
• OVRManager.tracker.GetPresent(id) does return true to ids 0, 1 and 2 (and false to id 3, as there's only 3 connected sensors).
• OVRManager.tracker.GetPoseValid(id) does return true to ids 0, 1 and 2 (and false to id 3).

• OVRManager.tracker.GetPose(id) returns valid positions and orientations to ids 0 and 1, but empty values for ids 2 and 3 (it should return valid values for id 2).

"Empty values" being position (0, 0, 0) and rotation (0, 180, 0).

Here is an output example:

trackers count: 3
------
id: 0 | present: True | poseValid: True
id: 0 | position: (0.9854, 1.8364, 0.5153)
id: 0 | rotation: (15.8191, 233.1839, 1.3493)
------
id: 1 | present: True | poseValid: True
id: 1 | position: (-1.7348, 1.6925, -1.0900)
id: 1 | rotation: (359.7148, 67.5559, 0.3881)
------
id: 2 | present: True | poseValid: True
id: 2 | position: (0.0000, 0.0000, 0.0000)
id: 2 | rotation: (0.0000, 180.0000, 0.0000)
------
id: 3 | present: False | poseValid: False
id: 3 | position: (0.0000, 0.0000, 0.0000)
id: 3 | rotation: (0.0000, 180.0000, 0.0000)

Is this a bug, or am I doing something wrong?

Thank you.