OpenWrt Support for Banana Pi BPI-R3 Mini

But is the new U-Boot aware of the different mtd partitions between SinoVoip/OpenWRT? Because using OpenWRT emmc U-Boot I tried to load the SinoVoip single image by tftp which worked without issues but writing using mtd or nand gave me errors or did nothing.
Meanwhile I was able to reproduce the slow upload problem which is not related to the wifi interface. I tested with iperf using only ethernet connections (1Gb adapters) and while the download (from wan to lan) is constant in the 850 Mbps range the upload is very variable:

[ 4] 15.01-16.00 sec 60.5 MBytes 513 Mbits/sec
[ 4] 16.00-17.01 sec 16.1 MBytes 134 Mbits/sec
[ 4] 17.01-18.01 sec 15.1 MBytes 127 Mbits/sec
[ 4] 18.01-19.01 sec 15.0 MBytes 126 Mbits/sec
[ 4] 19.01-20.00 sec 14.4 MBytes 122 Mbits/sec
[ 4] 20.00-21.01 sec 14.0 MBytes 117 Mbits/sec
[ 4] 21.01-22.00 sec 54.0 MBytes 454 Mbits/sec
[ 4] 22.00-23.01 sec 17.1 MBytes 143 Mbits/sec
[ 4] 23.01-24.00 sec 14.6 MBytes 124 Mbits/sec
[ 4] 24.00-25.01 sec 59.5 MBytes 497 Mbits/sec
[ 4] 25.01-26.00 sec 47.6 MBytes 402 Mbits/sec
[ 4] 26.00-27.02 sec 17.2 MBytes 143 Mbits/sec
[ 4] 27.02-28.00 sec 15.5 MBytes 132 Mbits/sec
[ 4] 28.00-29.00 sec 25.0 MBytes 210 Mbits/sec
[ 4] 29.00-30.01 sec 18.8 MBytes 155 Mbits/sec

Can anyone reproduce? I also noticed that the port does not work with some adapters, I've had problems with a laptop with Intel i219LM adapter, while Realtek adapters work fine.