I have a monitor set up vertically in 1080x1920 that I mainly use for browsing. I often come here for different games but the calculator bugs out when it's started in this resolution giving me "Calculated sensitivity too high". Fortnite is just an example, happens in every game where I want to calculate ADS sensitivity etc and I have to put something in the "Sensitivity 1" box.
Pictures: https://imgur.com/a/AvmW8rZ
Same exact inputs but it's not working in 1080x1920. I use Firefox, same result in Edge.