I set it up next to the router, transfer it to the next room - there is a connection, the speed is 0. I turn it back on next to the router - the speed is less than a megabit. I do a reset, set it up again, everything repeats - after setting it works, after turning it off / on, the speed is 0 or 0.6 Mb / s. As a result, it somehow worked and I did not touch it anymore.
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