I seem to have an issue where if I drag the actor around it lags behind and starts doing the movements itself. I change the clock speed of my computer from 3.9 to 2.2 GHz and there is no difference. I am not sure what's causing this issue. I have 32GB of RAM green foot is on an NVME drive. Java 8 is version 291 and 64 bit.
This is with a blank world with 900 900 and the image is only 52KB, when I try a bee with 5KB it's the same laggy actor problems.

