Drupal: Finder module not displaying all taxonomy terms in select element

So this site I'm am currently administrating uses Finder module for custom search. Filters for this search come from taxonomy, which has t开发者_开发技巧erms A, B, C and D. However, the select element in the search page leaves term C out.

I've checked the taxonomy vocabulary and all of the terms are identical (ofc not the term itself). URL aliases for them match too.

Also, if I create whole new taxonomy vocabulary and set it the source of finder choices, none of them are displayed.

Any ideas?