Since I transferred to a flip phone from Note9 with a capacitive finger print reader and S21 Plus with an in-display fingerprint sensor, I always have the issue of opening my flip phones via the side mounted button with the fingerprint sensor due to my sweaty hands. I even had the impatience to bring my original Z Flip to the service center to have it checked for any issue. It just turned out that I just need manually clean up the inner side of the button with a cotton buds to absorb any liquid secreted by my fingers! What a simple solution to a common problem we may all encounter! Haha! Hope this helps for anyone! 😉
