Maybe they fixed it or something at some point but mine suuuuucked until I got a new screen with a new fingerprint sensor. Now I don’t have issues very often and if I do its from junk on my finger or screen or something and it clears up with a quick wipe.
Yeah I’m 100% not giving that cup back and am collecting as many different ones as I can.
Admittedly I’ll probably bring them home and never use them and throw them away in a few years because omg I have way to many cups I can’t handle this anymore. But still.