The problem is that PANELS (and I assume TEXTs too)are only able
to display globally created non-structured strings.
Arrays count as structs in this case.
AND any string you use cannot be re-created with str_create either,
it just keeps using the old string from stored memory.
This applies ti BMAPs used on buttons in panels too.

All you can do us create global variables and do a str_cpy(globalstr,datastr);
to populate them when changed.