Revision table information disappearing on save?

Hello guys,

This is an unusual one and something I haven't come across in over 10 years of Solidworks use.

I recently moved a few drawings over to a new template and all seem to have the same problem. I 'insert revision table' and fill it out as normal but every time I save the document the 'DRAWN BY' field removes the text and goes blank. All the other fields remain the same.

Any ideas?

Many thanks

SolidworksDrawings And Detailing