I am suffering from the same bug. VER VER VER VER
I've found a cumbersome workaround by accident: if I start the virtual machine, put it to seamless mode and THEN enable OR disable external display, then it works correctly.
I am suffering from the same bug. VER VER VER VER
I've found a cumbersome workaround by accident: if I start the virtual machine, put it to seamless mode and THEN enable OR disable external display, then it works correctly.