@manuelalonso
Maybe @mgmeyers would consider adding something to his kanban css for the plugin that might fix it for anyone who uses a theme that styles their checkboxes the way the minimal theme does.
For a work around I added this css snippet to my snippets.css file and switched to the minimal theme:
input.task-list-item-checkbox {
width: 18px;
height: 18px;
}
And I got this result:
You turn on snippets here from the Appearance Options in settings:
Then you edit the snippets.css file in the .obsidian/snippets folder for your vault.
On a macOS you have to toggle hidden folders to see the hidden .obsidian folder in your vault. You can do that by typing cmd shift period:
cmd + shift + [.]
Use the same command to toggle “show hidden folders” off when you are done.
I am sure windows folks do something similar.
Good luck!