I was never taught, but as we're talking about a desktop apps UI rather than the game itself, I defer to this as what I would consider a good practice:
https://docs.microsoft.com/en-us/windows/apps/design/layout/screen-sizes-and-breakpoints-for-responsive-design
While I would certainly recommend any developer (or anyone really) upgrade to 4k, the practical reality is most devices aren't, and you want your app to be accessible to the biggest market.
;tldr the app should cater to its users, the user shouldn't have to cater to the app (unless explicitly required)
Anyway Duane's bug looks like it may be resolution agnostic as the interface is extending beyond its visible window (which is bad lol)