I created a custom taxonomy (event year), then a custom field (taxonomy advanced) to add a value to CPTs (give a year to each event). But the value is not registering in the backend when creating a new value ("add new event year"). It saves it somehow because if I reload the page then the new year will show in the taxonomy advanced dropdown menu, BUT IT DOESN'T SHOW while editing the CPT until refresh. But this is not usable since the field "event year" is set to "Required", the post will then not save with new year. I cannot deliver this to my client if they don't understand why adding a new year doesn't work, and I can't just tell them to "pre-create" years in the taxonomy's admin menu bar to then fetch it while editing the CPT, it makes no sense. Please help.