√ [MLZ] text-case="title" for a title with all caps
It seems that the attribute text-case="title" does not work if the title is stored in all caps. I didn't mean to store the title in all capitals, but that's what was grabbed by the translator.
Fixing the data in the database is also the right thing to do. The citation processor is non-interactive, it just takes the input data and imposes whatever transform is requested in the style. The only way to check whether things came out correctly is to check every citation in the document for accuracy. That's a good practice, of course, but we try to limit processor transforms to things that we know with some degree of certainty will come out correctly.
An all-caps title could be an acronym like "UNDP" or "OECD". It could be a title that is intentionally set in all-caps and customarily cited in that form. It's a bit risky to down-case things; relying on reasonably clean input data is more reliable, and likely to give you a better experience in the long run.