Operating system: Windows10 64Bit
Graphics card: Nvidia GTX1080
Broken: 2.81 2.82 ALL
The animation in 3D view is correct,
I cannot get the same image as the view that performs CTRL + F12 rendering.
If you execute CTRL + F12 rendering after displaying the intermediate frame in the 3D view timeline, the image will be even more strange.
The correct image was obtained with only one rendering of F12.
I confirmed that the correct image can be obtained when loop rendering is set in python and the index of point_chach is set.
Attach the file used for verification.