Update:Just upgrade the wireless card driver and problem fixed.
Just got my SFT1200 today,everything works fine with most of my devices except an rtl8812bu wireless card.
I have to set the bandwidth of 5G wifi to 20Mhz or 40Mhz to connect.The connection fails if the bandwidth set to 80mhz or 20/40/80mhz auto.
This only happens with my rtl8812bu card,which works fine with my gl-xe300’s 5g wifi.