360 VR preview not updating properly

Hi, college student here. Working on a 360 vr video for school, and it's my first time delving into this territory. When working with a VR 360 file, the option to preview a still of your animation is available to you. Unfortunately, when I make changes to my timeline, these changes are not always reflected when I update my VR preview. This makes it so I can't make sure my corrections so that stitching is not apparent are working.

Here is an example of this; my canvas is to the left, VR preview to the right. I have clicked "refresh". Notice that the ball is far away from the edge of the canvas where the stitch will be (there is another ball on the far right of the canvas in order to create a loop around the scene)

Sometimes, the lineart and the ball completely disappear when I try to update the preview as well, but I'm less concerned about that. I just need the preview to update when i change the position of this ball so I can make sure that it moves smoothly across the screen. Thank you for your time.