I add i18n to MVC and set one locale file PT (Portuguese), the problem which I find is that if query parameter is set to index page it cause 404 error.

Let's say

http://localhost:9001/pt works fine and opens Index web page in Portuguese, if query added http://localhost:9001/pt?a=1 the page do not works anymore and generates 404.

Any idea why and how to solve this?

This happens only on Index page, the http://localhost:9001/pt/my-non-index-page?a=1 works fine even with query.

Using latest 2.1.14 NuGet release.