Are you animating zoom settings or physically moving the camera toward and away from the subject? These two do very different things.
With zoom, you're essentially 'scaling' the image relative to the camera. There will be no parallax effect, so the character and background will appear to scale together even when they're located at different depths. Nothing is actually getting closer to the camera, so all the layers appear to scale as a single layer. For example...
As you move the camera closer, you should see the effect of the foreground character getting bigger, with the midground getting bigger but less so, and the distant background scaling the least. Nothing is actually scaling, of course, but the distance of each layer will affect how much 'scaling' you will see as you move the camera.
I'm using the same exact setup in both versions, with the layers arranged like so...
...and the only difference is how I'm animating the camera.
Here are the files if you care to examine them:
CameraDemoFiles.zip
Moho respects the behavior of real-world cameras, and from what I can tell, Moho 14's camera is working the same as it did in Moho 13.5.5. (I
think there are some improvements with the camera in 14, but I'm not 100% sure about that.)
If the above doesn't help, I think we need more information about your setup and how you expect it to behave. Also, which version of Moho are you using, which OS, and are you using a mouse or pen?
By the way, when you combine the two but push them against each other, things can get really weird, like the background moving farther away as you get closer to it. Sometimes, you see this effect in horror or suspense movies.