I made my first lens today (YAY!) and I love it!
It will only open with my outward-facing camera - I can switch cameras and use it to take a selfie, but only after I've opened it facing out first. If I start in the front-facing camera, it doesn't come up as an option.
Is there a way to specify which camera is the default for opening a lens? I have an idea for one that would mostly be used for selfies, but making people select it with the other camera first and then flip could be confusing.