For context: I DON'T own this game but my younger sister does so I can play it through her family thing since she can't with her phobia!

I tried to make a YouTube video about this but got frustrated. But I saw nothing wrong. Playing on my own terms now, having started yesterday? Yeah. Now I am using my grandfather's Dell Inspiron 15, since my ASUS cronked so quick. But this was mine so it was as updated as it could be. Hey, I even used to play a bit of Subnautica on this back in the day. Now, I see VERY random flashes. From what I remember, I saw a white "dot" and after the queen a purple "dot". Let me also mention the TWO sideways crashfish, the cave crawler in a box AND the peeper somehow stuck in my lifepod and despite popping out enough, not grab-able. And that is SO far with the setting lowered because this is an older laptop. Not even my Nintendo Switch (which is VERY laggy sometimes) does this. So. Is my save corrupted given that it's only this game causing issues?