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There is an old trick you can try.

After I hard Reset pair it at the longest distance that it will pair OR in the noisest environment (like in you car).

It will hunt for the first working channel. If you put it in marginal conditions it will skip the marginal channel.

You can clear out the registry so it will start fresh without a hard reset but I forget how.

If you don't clear it, it will attempt with the same channel if you try to re-pair it.

YMMV.