Cant open multiple VSTi in the same time?

i cant open multiple VSTi in the same time, only one visible?
why? in 2.8.2 it is work well, in beta4 i cant do this… is there an option or something to do that?
or it is just not working right?

i want multiple vst windows like in 2.8.2… thank you for the help…

Uncheck the box in the red square:

ahhh half finish…
num 0 not show and hide the plugin :D