With wikidata, following the recent update, when text is pasted with leading spaces or a tab, the lookahead function used to be able to ignore the leading characters and focus on the text for its search. The chomp function has disappeared.
a simple example "
female given name
" is a text copy from the description field and it used to be able to be pasted into "instance of", and remove the superfluous spaces in its lookup. Ability lost.