These behaviours are in the game, its just rather subtle.
Instead of constantly grouping, the games enritchment system activly encourages animal hot spots where they flock to together, meaning that the animals need system will generally keep them together, while also encouraging animals wandering of on their own from time to time.
This creates a nice flow through the habitat, especally when the enritchment is layed out nicly, where the animals can be watched following a routine over time where they move througout the habitat, most of the time in small groups.
And in addition to that it seems like in a few update frontier has sneakily tweaked how close the animals stay together while idling, which means that most of the time if you got 4 animals in a habitat, you will see them in a 3/1 or 2/2 constelation, but allmost never 1/1/1/1.
And with the consitency that this occurs for me im sometimes wondering why this reqiest is still a thing.
Atleast my animals are allways in groups, especally in larger habitats there will allways be clusters of them, so i allways ask myself what the big deal is when its an issie allready adressed around conservations release
