Hey guys, sorry that I have to write again but there is a z-index bug in the new version: https://imgur.com/a/UgGHWEk

You introduced a new z-index property for the new classic-tabs.

New version:

.classic-tabs .nav {
white-space: nowrap;
overflow-x: auto;
z-index: 2;
position: relative;
-webkit-border-radius: .3rem .3rem 0 0;
border-radius: .3rem .3rem 0 0;
}

Old Version:

.classic-tabs {
white-space: nowrap;
overflow-x: auto;
-webkit-border-radius: .3rem .3rem 0 0;
border-radius: .3rem .3rem 0 0;
}