IDX2323 Nonce Issue

My problem is similar to the post below.
Where I’m getting an idx2323 nonce error mentioned here:

I’ve tried using the iis rewrite rule mentioned there, but to no avail.

My website has an ssl cert for both: https://mydwpappsdev and
the okta oidc dashboard has both urls listed for each url entry (sign in redirect, sign out redirect, initiate)
However my application ( MVC) configuration only allows 1 redirect uri, which I’ve set as the fully qualified domain name:

It works when i type in the fully qualified domain name. however when i use the abbreviated url, it gives me the nonce error: IDX221323.
Is there any way I can have the abbreviated url working as if I’m typing in the fqdn as well?

If anyone can guide me in the right direction, it would be greatly appreciated.
I’ve tried the samesite=none configurations, and the iis url rewrite to no avail.

Have you already checked this article? Troubleshooting IDX21323: RequireNonce is “System.Boolean” | Okta Help Center