Memory leak only just started happening. Game left running for approx 4 - 5 mins and mem usage in 10GB region, FPS was down to 15 or so. I have a pretty good pc so i shouldn't experience this. When I went to check the video settings it came back as 128 chunk render distance. Touching the bar made it revert back to allowed numbers.

I'm not sure if it matters, but I did just update my video card drivers (17/08/20) to GeForce 452.06