Im not really sure where to ask this question or where to report this “bug”, but the kde version of networkmanager’s captive portal login functionality links directly to a “.txt” file, so captive portal redirects dont work. i’m on an arch based distro.
frankly i think it would be good to have the cp login attempt link be configurable.
I do wonder if a .txt file inherently messes that up, though, only because I don’t recall having problems the few times I’ve used a captive portal connection on my Fedora laptop, and Fedora uses a similar configuration: Tree - rpms/NetworkManager - src.fedoraproject.org .
If it does reproducibly cause issues, though, then that should be reported to the Arch Linux packagers.