I think the answer is yes... and no.
MC will use the last Zone if it can. If the last Zone was a Dynamic Zone, and that Zone is no longer visible, MC will default to a visible Zone. It always takes a while for a DLNA Renderer to announce itself and for MC to find it.
A DLNA Renderer like the microRendu is a Dynamic Zone. It always takes a while for a DLNA Renderer to announce itself and for MC to find it. If you started the microRendu, then the PC, and then started MC, with a delay between each, MC may see and retain the Zone selection on the microRendu. It may not. In fact, even if the microRendu is announced, MC still needs to find it. So you will probably get the same problem.
There is a Zone toggle Hotkey in MC: Ctrl+T. Using that could shorten your current process, once the microRendu has been seen by MC. I think there is a Hotkey to jump to the Audio section as well. Certainly, there is a command in to use Theatre View, but if memory serves there is a command for Standard View as well. Or you could just use the mouse.