I use the Duo app to get two-factor codes to log into Geekzone (and other supported sites). For some reason I find it occasionally takes up to three attempts (refreshing the code before each attempt) to log into Geekzone. This is not something I've observed with my other 2FC sites such as Fastmail, Facebook, Backblaze and DigitalOcean—all of which accept my codes on the first attempt every time. Is this a known issue specific to Geekzone?