Hello. I am a regular user of the English Wiktionary. I wanted to note that, when trying to use the advanced search function to search only words in the category Category:English lemmas, I suddenly get the error message "A warning has occurred while searching: Deep category query returned too many categories".
I have used the advanced search feature to search for words that are in this category many times before, but suddenly it no longer works, spitting out that error message. Another Wiktionary user has confirmed this bizarre seeming bug.
The other user in question, an administrator on Wiktionary, noted that there do not appear to be any more subcategories that have been added (per the Recent Changes list) that would have made the feature no longer work for this category.
With that said, attempting the same advanced search with Category:English adjectives results in search results as normal. So I'm not sure what is going on here.
Category:English lemmas has fifteen subcategories, so you know.