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Nothing, even after restoring the Q2 to the factory settings, the right controller refused to work again. I think it was blocked due to an unsuccessful firmware update. In fact, the controller only pairs with the mobile app but was not tracked by the viewer, it did not have the 15 sensors turned on on the halo, it only had the LED under the meta logo which, after pairing, continuously flashed a very intense white (I think it is the equivalent of the white LED that gives SOS in morse code). After 4 resets of the viewer, the system tried 4 times to update the controller but the update always failed because the controller no longer communicated well with the device.
The visor only saw it appear and disappear in the controller icons in the quick menu, but it didn't track it at all.
in the end I also sent it today for RMA replacement.
At this point, given that v59 probably also includes the firmware update of the controllers, I advise everyone to keep them charged and be careful not to deactivate/switch them off and worse, replace the batteries while the update is in progress.