I've made some test this morning playing orbus vr, specifically in the main menu where you can see a mirror of yourself.
When I put the controller on the back of my head to induce tracking lost the controller didn't seem to snap back when they where in view of the side camera...instead they seems to only snap back when the front the top or the bottom camera seems to see them.
Can someone else confirm this? could this be the reason why they seems really slow to reacquire tracking? Also there is no option so see what those camera sees so I cannot confirm they are indeed working.
I also frequently lost tracking of my right controller and it never snap back into place( must reboot controller), mostly in fast pace game ( beat saber and sort of gargantua) that makes them unplayable for me.