UnityEngine XR API's cannot connect more than two trackers

Hi,

I am using three Vive Trackers (2018) along with SteamVR 2.0 basestations, and the UnityXR API. However, every single time I try to use any of the API's, either using

Code (CSharp):

1. InputTracking.GetNodeStates(_nodeStates);

\
or

Code (CSharp):

1. InputDevices.GetDevices(inputDevices);

only two out of the three of them can only show up at a time. They each individually show up and work, though. And I have verified that all three trackers are working with SteamVR.

If I could get any tips on how to debug this, or workarounds, it'd be very much appreciated!
Thanks!