i used a vive tracker from 4.27 to 5.1 as my virtual camera tracker to simulate the position of my camera in unreal. Since 5.2 my tracker only works in VR-Preview but if i try to start my scene over switchboard to my led-wall my tracker is not responding at all.
I use steam vr and the livelink plugin (and open xr plugin)
Not sure if you are using a cluster of computers but I had a similar problem and for me the issue was that I was using the loopback 127.0.01 address in the LiveLink preset. When running on an nDisplay cluster you need to use the actual IP of the system that’s doing the tracking.