Convergence fail to return home

I add vtail mixer to Convergence. It successfully forward convert to FW mode at it’s first flight.
But the secend time I bring it to airport, it fly away when I switch RTL at FW mode, and I make sure RTL work all right at MC mode before I switch to FW mode.
I take off at MC position mode, make it face into the wind, then I switch to FW mode, the plane won’t fly into the wind, but turn about 90 degree, and start to convert to FW, then I switch RTL mode, It fly away, i found it on a high tree the next day.
below is the log, can anybody help me find out what’s wong?

thanks a lot