Hi,
Yep, tried Redefining the tag with the exact method you described, but had no effect. However if I deleted an instance of a tag and then reapplied the tag to that same object it would display as expected .
I also tried redefining the text to a new filed in the same record, restarting Vectorworks, but it had the same issue, and likewise if I deleted the instance of the tag and reapplied the same tag to the object it would behave as expected while the other old tags still in the file (of the same style) were not displaying as expected.
Hope that makes sense, I've said tag too many times,
S