I just updated from 2019 to 2021r1.
One wrinkle is that the lines in the symbols are now really fat. I was able to change some of the circles but not symbols like quarter circle which stays as a black blob.
On text with border, the border widths are very large. I can change the line width from 0 to 0.01g and the line thins back down but this is retroactive on my old drawings so I have to go back in each drawing and change each symbol.