Cut & Paste of Sub-form causes form corruption

I have an application with a simple sub-form that contains common buttons such as Save, Edit, Close, etc.I was working on formatting the form contents, moving things around. I would cut and paste the button sub-form to move it to different locations within a table on the form. I’ve done this for years without errors, but on two occasions now, once I paste the sub-form into a new location, like at the top row to the table from the bottom row, the rest of the information (fields text table rows, etc) all disappear, and I can’t recover them.

Notes and Designer version:

IBM Lotus Notes 8.5

Release 8.5.1

Revision 20090929.1223 (Release 8.5.1)

Standard Configuration

IBM Lotus Domino Designer 8.5

Release 8.5.1

Revision 20090929.1223 (Release 8.5.1)

Standard Configuration