“Samsung Electronics is aware of the case of the S10’s malfunctioning fingerprint recognition and will soon issue a software patch,” the company told Reuters in a statement. The problem has been deemed serious enough that an online bank in South Korea, KaKaobank, has advised owners to switch off fingerprint recognition until it’s resolved.

It’s not clear what’s causing the problem, but the Galaxy S10 uses an ultrasonic sensor to detect fingerprint ridges. Plastic or silicon screen protectors can stymie it, so Samsung has been recommending that buyers used approved protective devices. That doesn’t explain why the system is allowing access to non-registered fingerprints, however, so Engadget has reached out to Samsung for more information.

Samsung originally told UK publication the Sun, which first reported the issue, that it was looking into the issue. Until a patch comes, you could use Samsung’s face unlocking, but that has had its own issues. For now, maybe just use a good old code.