Are these bugs?

I am working on a 4K display. Just going through the features of Essentials 20. This is what I encounter:

-When I use the select tool, the Snapping is not working correctly. Snapping to the grid, snaps the pivot to the grid, but you can clearly see it is not touching the grid.
-And in Snapping to contour, trying to snap with a drawing, you barely see it is snapping. If it snaps, it is not snapping correctly and if you zoom in, it does not snap at all.
-In the Select tool you can enable Select by Colour. But if you try to combine that with Apply to Visible Drawing Layers, you still can only select by colour for only 1 selected layer. It does not select colours on different layers.