My world is stuck in experimental

I’m in beta and I activated the experiment of the Happy Ghast. I could use it normally and go to explore, but since the happy ghast was made available without experiments, my world kept the experimental tag and since then I’m unable to ride ghasts or llamas. I thought it was because of my addons but I created a new world, activated the same addons and everything worked perfectly.

Will that tag ever disappear? I activated experiments for camels and the tag disappeared.