Unfortunately I never got to fix this. Support wasn’t able to either.
The reason how this happened might be be my setup:
– I use gulp/webpack & have an autoreload on my browsers during dev.
– I think this happened when when I open the same site in 2 different tabs, and then make changes & the autoreloads happens..
Just wondering if you also have autoreload during dev?
Why it happened is a mystery to me.
To get around this issue i just set my view to 1 column instead of 2 for this project.
Ok never mind, didn’t read the documentation well enough 🙂
Was printing the ID instead of category_id 😉
http://www.advancedcustomfields.com/resources/how-to/how-to-get-values-from-a-taxonomy-term/