I decide to give it a go, since R* said they improved stuff. I have to say that things are looking up. Last 4 months haven't seen 1 animal to kill.
Now, I'm at least able to fill my camp up 100% of materials.
1st time I noticed animals stop spawning. I fast travel to a new location & started looking for Collectibles. After collecting a few Collectibles, I started seeing animals spawning again. Not sure if I was just lucky to get them spawning again. Few other time I've had issues with animals not spawning, I just do a Story Mission or a Bootlegger Mission & animals start to spawn in again.
I'm also able to see dynamic events & gang hideouts are back.
The game still has it's issues, but it's a lot better than a few months ago.
Well at least R* is trying to work on the issues. Even though they're working at a snails pace.