I have cells that contain metadata like: ID, dateTimeTo, dateTimeFrom, hours, etc.
In the table I only show the hours value. Setting the metadata works without a problem.
But when I try to copy/paste and/or use the Autofill.fill action, the metadata doesn’t get copied over to the target cells.
I’ve posted a similar reply here https://github.com/handsontable/handsontable/issues/7596
You can use my demo to copy your metadata. It would be best if you changed the beforePaste to beforeAutofill and afterPaste to afterAutofill.
Also that example cover a once-cell change.