In keyline and normal view, when zooming in very close, the image breaks down. This didn't happen in previous versions. The first attached image shows the image correctly, with zoom at 12750%. The second attachment shows the image 'broken down' when zoomed in further. The multitude of diagonal lines shouldn't be there (these increase when panning) and the selected line (that I'm trying to work on) should be a complete line, not an endpoint. This bug makes detailed work very difficult.
PC Windows 10 Home 64-bit v.21H2
Illustrator 26.0.3 (64bit)