New options being added automatically

Hello people,

Whenever I create a poll, I leave the “Allow Visitors to add new options” option unchecked (https://prnt.sc/ru4xbn) to not allow users to create new voting options. And on the page where I insert the poll, the “New option” button doesn’t really appear. However, when I enter the page hours later, one or two options created with the name “marceo” appear.

It cannot be the users who are creating these options as this function is disabled. So, maybe it’s a plugin bug.