Option to ignore cases in tag filtering

With lots of tags there is high possibility that these exist in inconsistent capitalization, e.g. "TC" "tc" "Tc" "tC"

presently this leads to results that are disjunct for all the capitalizations.
An option to ignore case during search would be highly appreciated (e.g. like search.case.sensitive=no in taskwarrior configuration), to collect all versions together.

(Or alternatively a command to harmonize and clean up tag space)

Thanks for considering