3 AP 1815w, one of them - ME controller. 8.10.121.0 (but as I remember the same issue was on all previous versions).
100mbit internet channel.
By wire, also through 1815w Ethernet port (plan) download speed is about 90mbit, same upload.
Through wifi (ac clients) it is about 90mbit download speed also. But upload speed Is always about 30mbit :((
No limits in QOS, platinum profile.
Does anyone have the same problem? or may be know solution?