Broken Water Mob Pathfinding

I have encountered an issue where water based mobs begin to experience a break in their pathfinding. This seems to happen when they encounter fences and or wall blocks and will continue to try and go in that same direction despite the obstruction. I will mention that I dont use any addons of any kind and only use the prizma marketplace texture pack hence why the dolphin looks different than the vanilla version texture. On a somewhat relevant note, why are baby dolphins able to consume golden dandelions if they still die due to their breathing mechanics? Could it be possible to make the dolphins not require surfacing for air? I understand it takes away from the realism, but would allow players to both keep and feed dolphins golden dandelions without the dolphins suffocating.