When you connect to a RHEL 10 server using Duo (pam_duo) on RHEL 10, things start normally with getting the banner message of the system. It than asks for your username unless you have it set to auto use it, then your password, than it does the interaction to input your Duo code or have it do a Duo Push. At the very end though, it takes the "Success. Logging you in..." from Duo as a new Banner message, displaying it as a banner. Even if you check "Do not show this again", it just resets the next time you login showing the initial banner and then the success message at the end. I think this is because it takes the success message as a new banner, its only saving the hash of the success message and no longer remembers the initial banner notice.

This oddly didn't happen on previous versions of RHEL, it only started on RHEL 10 using Duo's provided pam_duo packages.