@emily Hi. If you can please send us the file. Upload it to dropbox or google drive and paste the link so developers can take a look at it.
I’ll try to reproduce this issue on a different file meanwhile to see if there’s any way to solve it.
Meanwhile please let us know which version of Pencil2D you are using. If you are using an older version of the software if may be difficult to recover lost work but please follow this guide just in case