I had this scenario:
sxt-lite5-klient(1)----wireless---wlan1-sxt-sar2-ap(2)-ether1----ethernet---rb2011(3)
in sar2 ap(2) there was bridge between interface ether1 and wlan1.
throughoutput between 1 and 2 was 80mbit/s (1tcp)
throughoutput between 1 and 3 was 28mbit/s (1tcp)
after disabling bridge in ap2 and routing everything...this issue was solved.....
now throughoutput between 1 and 3 is 80mbit/s...
DONT USE BRIDGE WHEN YOU USE NV2