We have equipment that uses wireless adapters with the RTL8812AU chipset, and have MR46 APs across different sites. The MR46 APs are on firmware 27.6. The wireless adapters have no issues with other APs, and the MR46 APs have no issues with other wireless devices. When these are connected together, the signal strength appears to be good but the wireless connection drops prematurely. MR46 2.4 GHz, channel 11: With the RTL8812AU it connects at 32dB signal strength, drops off around 29-31dB. MR46 5 GHz, channel 112: With the RTL8812AU it connects at 39dB signal strength, drops off around 36dB. With different settings (ch40 and wider channels), Windows shows the link speed is 585-866 Mbps. It suddenly will drop/disconnect when moving "out of range" at a similar signal strength, although wifi analyzer software shows there's still a good 5 GHz signal. The same issue happens on different channels and with any device the wireless adapters are plugged into (such as a Windows laptop). The result of this is that the equipment fails to connect or reconnect to the APs intermittently. It seems like it's trying to connect to the 5 GHz network since the wireless adapter can see it, but for some reason can't connect, then will either try to keep connecting until it fails, or try to connect to the 2.4 GHz network (usually successfully since it has a further range).
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