AutoCAD Inventor :: Template Text Resizes Itself

We've a drawing template we've used for years with no issue.  Recently, it's gone a bit strange.  Text on the template is resizing itself, and we don't know why.

We open a drawing template and it looks fine. We go into iproperties to edit some of the fields. When we exit the iproperties, some text has somehow made itself huge, and other text has gone small. I'm suspecting this is something to do with the styles library, which we've only recently started using.