Domain name on Influxdb

Hi, we are using Influxdb to save scan report data and we have a problem on domain name because the saved value for domain is in IDN format (example edonè.com became xn--edon-8oa.com) and this is a problem for a Db to have a right order or search not using specific function in where clause. The last db (Influxdb e Graphite too) can save the plain format without a problem.

Is it a bug or a or something desired for other motivation ?

Thank you very much