Hi Rodrigo,
Posing here as comments page: https://moodle.org/plugins/format_board - not allowing comments for some reason.
Please improve your CSS and make it specific to your course format. Just caused a false bug on the Essential theme with this iffy CSS:
.section .activity .mod-indent-outer {
padding: 0 !important;
}The solution is ugly and use of '!important' should only be used when needed. You can easily solve your problem by using a more specific CSS selector that targets your format only.
See: https://github.com/gjb2048/moodle-theme_essential/issues/728.
Gareth