To be honest, I am not sure why it did not start with a working size to begin with. This is the first report we get about this, and in all of our testing (pancake and VR), this has not been an issue.
We can only tell the simulator what dimensions we would like and hope that it honors our requirements, but in this case, it sounds like that did not work as intended. I guess we could try to increase it even more!
The window should not need to be “too big for VR” to work. If that is the case, something is off on your end. It should be possible to use it comfortably at tablet size an arm’s length away, is that not the case?
Kind Regards,
Malte