I have had this issue since release and also encountered it in ARK before. I did alot of investigation and tried everything I could find via google because I lost quite a bit of ships and other stuff when the game crashed while fighting. The one and only thing that actually worked was lowering the core clock and memory clock of my gpu via MSI Afterburner. I own a GTX 1080 TI. Before I had this error multiple times a session and now not even once since adjusting gpu mhz via this software. Just for reference I lowered both by 100 MHz but I'm no expert at this. Maybe someone has more insight.