Rendering artifacts first time playing animations, but not 2nd+ times

[JorySchossau]

I'm just trying to run the demo code from the frontpage readme.
If I let the animation loop, then the artifacts are gone.

Linux
Nim 1.6.0
nanim default nimble & head

[EriKWDev]

I have experienced this issue as well on the latest version, but I do not currently know why it is happening. It's a shame really since it hindered me a bit the latest time I wanted to make some animations as well.

I will investigate!