I updated my server to the new 1.16.1 to enjoy all the new features with my friends. In a previous minecraft version we cured a zombie villager and it became a toolsmith. However, I realized that our toolsmith is an unemployed villager now and it was not possible to spawn or find any villager with a profession in natural villages, with spawn eggs or commands anymore. An issue of the server software or used plugins can be excluded since this problem exists in singleplayer worlds, too.