Applicable browsers: Any browser
It is currently not possible cut and paste documents between workspaces if you paste the documents in a sub-folder that contains % or # in its name.
The issue does not arise if you move documents within a workspace to a sub-folder that contains these characters in its name.
You can either choose to rename the sub-folder that has the special characters or, as a workaround, you can first paste the documents in the destination workspace’s root folder and then cut and paste them again to the folder in the workspace that contain these characters.
This is a bug in the available APIs for moving documents in SharePoint and we hope that Microsoft will release a fix for it soon.