The "fix" is to restore BridgeOS on the T2. This can be done using a 2nd MacBook that has a USB-C port, downloading Apple Configurator 2 software and connecting the 2 laptops with a USB-C cable. The MacBook that needs restored has to be put into DFU mode. It's useless to take it to a Genius Bar. All they will do is keep it for 6 days and run diagnostics on it. If you can't do this yourself, you should just wait until Big Sur final is released. Hopefully by then the issue will be resolved
macguy59
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