Yes… users are reporting the missing names in multiple threads since yesterday:
https://community.smartthings.com/t/samsung-connect-home-smartthings-wifi-0-47-10-lock-code-names-reset/265921
https://community.smartthings.com/t/door-lock-guest-codes-set-and-unset-by-some-one-thing-else-15-feb-2023/258863/51