Guys thank you so much for all that messages I figured it out earlier today, and like @stokerg said, it was caused by duplicated layers names. I simply copied Artboard which I wanted to export and pasted it to the New File, ale strange attributes disappeared. Primary .afdesign project is a huuuge project with many Artboards so many layers had been duplicated.
Also @walt.farrell at first I thought you might have some point, but then I realized that SVG is a web format file and it shouldn't have any unnecessary tags in it, especially ones with semicolons, so it's definitely not a React's bug, cause it was working fine except fact that the console was logging many errors.
Anyway the problem solved, so we can close this topic
Thanks again folks! Peace