Hi @Sebasgaes - really sorry about that, looks like we had a fix to another bug cause this issue for situations where the tab links and the tab panes visually overlapped (as they do on your site). For most usages of Tabs this was not noticed (since the default is for Tab links to stack on top of the panes, not on the side), but we just identified that issue and reverted that fix.
If you refresh your Designer (you might need to Shift+Refresh and/or clear cache) and re-publish your site, your tab links should start working again. Please let us know if that’s not the case. Thank you!