I have created my own UDPs and utilise a few text attributes. The schematic block appear as normal when I drop them into drawing. However randomly some of the text attributes disappear from the Schematic blocks when working on the drawing. They will only reappear again when I delete the block and drop back in from available symbols. 

Hi Yuri,

To understand this we'd need to reproduce what you're seeing.  Please email your .S07 project file to techsupport@stardraw.com along with instructions on how to reproduce what you describe and we will be happy to investigate.

Kind regards,
Rob Robinson
Stardraw.com