Can confirm as well, if you set "gamerule recipesunlocked false" the category tabs come back. FYI I am not using experiments.
To add further to our evidence, I too have been experiencing this issue.
The test cursor happens on realms and locally. Yes, I am using add-ons.
Can confirm as well, if you set "gamerule recipesunlocked false" the category tabs come back. FYI I am not using experiments.