Hi Brian,
yes it's exactly what it's happen for me.

Please try :

1•Click lightbulb to open MoI v4, MoI works normally, draw a circle, square, etc.
2•Click lightbulb to "hide" v4.
3•Click lightbulb to "unhide" v4.
The dialog window in the upper righthand corner no longer functions. It is blank, or frozen depending upon state before hide/unhide.

4•CLIC AGAIN ON LIGHTBULB and try to draw

thanks