That’s really weird.

Are you sure you haven’t accidentally added something?

I’ve had similar things happen all related to human error. Check these yourself too. They are quite facepalm worthy.

-Applying Tween to effects consisting of multiple figures may result in flickering, like with Explosion1, Explosion2, and Explosion3.
The tween adds frames in between that do not contain the figure that was deleted in the previous scene. Go to the individual ”explosion” figure and enable “keep figure during tweening”

-Perhaps it’s a movieclip relooping. I’ve had movieclips that have invisible frames so I usually forget to delete them so they reappear. I movieclip most of my scenes for performance issue.

-Perhaps there’s an auto-camera somewhere that is moving it to frame 1.

Non-Human errors:

-Exceeding the frame limit your device can handle. I’ve had mine nearly explode occasionally.
-Exceeding the node limit (by enabling unlimited nodes in the settings)
-Way too many filters and effects.
-Update the app 🤷‍♂️

If none of these fix the issue, than there is something bigger at play. Contact Ralph so he can provide better help. I do not have technical insides of the app