I get exactly this issue as well.. it used to be in both 2.4 and 5GHz bands, but now only in the 5GHz after I disabled "allow the computer to turn off this device to save power" in power management on the adapter properties..
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I get exactly this issue as well.. it used to be in both 2.4 and 5GHz bands, but now only in the 5GHz after I disabled "allow the computer to turn off this device to save power" in power management on the adapter properties..