Can't unlock enrichment with research

I have all research completed for all of my animals in the zoo, but some of their enrichment is still locked. What do I need to do to unlock them? Is this a bug? Can I somehow abandon all research for an animal and start researching again to gan access to said items?
 
Research shared across all Franchise Zoos:
  • In order to make sure you've got all of your research data from across your Franchise you'll need to load into each zoo individually. This is due to the fact that if we were to do this in the background, it could create incredibly long loading times for you, so to make the game more seamless when loading zoos, your Franchise zoos will load research individually once you load into them. Once your Franchise zoos are all up to date, this will create a new baseline of research shared across them, until you upgrade research further.
Did you load every zoo?
 
So far I have every species only in different zoo and only one vet researching it so my understanding is that there is no need for me to load totally empty zoo I opened as a placeholder for future expansion
 
Could you post 1 or 2 screenshots? (At least 1 of the completed research of a species and 1 of the missing/locked items when you filter on that animal enrichment items or the zoopedia page which also mentions the enrichment items?).

There's not much info in your first post to say anything about this.
 
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