Implicit Curve display bug or glitch
I am facing a strange behavior when sketching implicit curves. The graphs are not displayed properly, and the display changes when zooming in or out, or when changing the value of a slider or when shifting the graphics view.
See attached screenshots 1, 2 and 3.
As may see, the green graph has an unexplained gap in the first two screenshots.
The red and the green graphs, not only have unexplained gaps, but they also look like they are not symmetrical to the y axis, despite that they really are symmetrical.
Also, when the value of the slider is changed, this is not properly displayed in the red graph's domain.
I am using GeoGebra 5 Classic v5.0.591.0-d (23 June 2020) on a Windows 7 64bit Ultimate machine with ESU security updates, on a Ryzen 2600x CPU with 32 GB RAM and a GTX1080Ti GPU. I also tried the GeoGebra online calculator and the glitches were reproduced, as seen in screenshot 4.
I also attach the test file for your reference and I appreciate any input.