@erzulie I can see your drawings just fine! I think it’s as I suspected.
If the camera layer selected and you ZOOM IN / ZOOM OUT, the camera will MOVE, so the background will appear to change position.
If you select any other layer, you will zoom the VIEW, not the camera.
So if you need to move around the document while drawing, select any other layer instead of the camera, otherwise when you select the camera it will show you the full size of the camera resolution, and it will always maintain that size no matter how much you zoom. Which in turn will make your drawings dissappear out of the camera frame.
My advice is, only move your camera after you have finished your animation, or if you need to PAN or ZOOM, try to create a reference drawing, move the camera and then continue to draw the rest.
Here’s a screenshot I took after opening your file. I used the latest version of Pencil2D as well. I could see all your drawings just fine. Which means it’s not the software.
Also JUST IN CASE, the TEST M.PCL file needs to be OUTSIDE the folder, not inside or it won’t read your drawings properly.