This is by design I doubt it will be changed. Keep your dinos on a hitching post or inside a barn.

I've noticed Torosaurus does this as well with its intimidation, yet Deltadromeus does not. It's not directly intended to make dinos spaz out as i've been dealing with it myself.

Gonna look more into why delta doesnt make things have a stroke and hopefully go from there. The initial "Scare away" buff is childed from the same stuff as Parasaur, so...

I doubt this can be fixed, because it looks like bugged stasis is causing this. If any fearing effect wears off while dinos are out of render distance, they glitch out.

The same effect occurs if you are riding a dino - if a fear debuff runs out while you're still riding it, the dino won't switch to their previous stance, it is always passive or more common passive flee. Not counting mod creatures, I think only Parasaur honk is causing the passive flee on dinos (that can be feared by it).

So, to counter this, I dismout right before debuff wears off. This bug is the only reason I had to remove fearing dinos from spawning within areas that have mine set on wander. I'd like this to be fixed, but I won't count on Wildcard lol.