I uploaded a bunch of contacts with addresses but without country specified. We have mostly United States contacts. Oddly CiviCRM assigned many of them Hungary as their country. Other countries also were assigned - El Salvador, Suriname, Slovakia, Soloman Islands, Nicaragua, and Uruguay also got assigned to some contacts, but for the most part it was Hungary.
We did not have a default country setup in localization.
Any idea why? Civi 5.48 / Wordpress