Able to start Simulacrum outside of the proper room

I was able (accidentally) to start a Simulacrum level while still standing on the previous room, which locked me out of any progress.

This led me to becoming stuck and unable to progress within the Simulacrum, having no other choice but to give up.

Also, since we're talking about this, why is the stash always under the HUGE window with the simulacrum modifiers? You know how hard it is to click that?

Hopefully you can fix this asap, doesn't feel nice to lose that much to a bug.