Why doesn't my UI cover fullscreen on android?

It previously was when I had built it to android, was working great. But now, my main menu, The UI takes a very small portion of the screen in the bottom left corner - as if the camera is zoomed out a really long way from the entire canvas.

The most notable change I made since I last built it to android was I animated a panel within the canvas, to start off screen and Fly in, then another animation to have it fly back out.

In editor, this works great. The UI canvas takes the whole game screen and animations work great. However on android, the entire canvas takes up a small percentage of screen, smaller than it would be forced to if it was accounting for the panel's extra space also. Any thoughts?