How to redirectURL with .aspx for old nopcommerce 3.xx?

Good day,
Our customer is using Nop Version 3.90 and we have the Redirect Manager plugin installed. Version 1.11.
When I try and apply a redirect to www.lightsavers.co.za/terms.aspx
to redirect to
https://www.clearskyleds.co.za/terms-and-conditions
it redirects to the homepage instead: https://www.clearskyleds.co.za
Here is a screenshot of the field in the Redirect Manager plugin:
Please could you assist and advise why this is not working?

URLs with dot is static URL for old ASP.NET (nop 3.xx).
IIS tried to find the static file on the disk.
new nop 4.xx (ASP.NET Core) has another logic and my plugin can catch such URLs.

See this answer how to catch URLs with .php. You can add such rule for .aspx URLs.
[url=/boards/topic/521/bug-with-php-urls]https://www.foxnetsoft.com/boards/topic/521/bug-with-php-urls[/url]