What seems to be the problem:
@this.set('adSectionTypeId', e.target.value); does NOT get process to be something like
window.livewire.find('K8QaFhLfxVseLTVsmU8p').set('adSectionTypeId', e.target.value); on the server.
But developing locally - it works and it processed just fine. Same composer settings both updated.
Any idea how why?
Are you using the latest version of Livewire: yes