Same switch, same AP, same controller, same subnet. Have seen this on all 8.2 - will try 8.3 but would prefer cisco to reproduce since I can every time ;)
Same setup here, same problem: I get 15MB/s download when AP's are in flexconnect mode, and 45MB/s when they are in local mode. All other settings are unchanged when re-producing this error. Client is Asus PCE-AC68. Client connects M9 SS3 everytime, ...