I have tried the latest drivers for Windows10 / Windows7 and results from ping/throughput (iperf) test have been consistent since 18.40.0.0. After roaming through 3-5 access points, AIR-LAP1142N-A-K9 or AIR-CAP3702I-B-K9, clients don't continue to roam but temporarily disconnect then reconnect after 3-6sec sometimes longer. I have found that driver version 17.0.5.8 works flawless (acceptable <1-2sec network loss/roam) on 5.2xGhz using the AC-7260 Windows7 machine. Where can we get this driver to continue testing on the other three devices. Windows10 64-bit, AC-7265, AC-8260 and Windows7 AC-8260?
Food for thought: Devices have no issues roaming when adapter set to 2.4Ghz Preferred using latest drivers, 19.20 or 19.30. Due to hospital environment we need to have clinical device set to use only 5.2xGhz.