Font rendering issues since 2020.3

I have realized there are some font rendering issues in CLion, but so far I was happy. I have been using 2020.2 since earlier this year, since after upgrading to 2020.3 I've encountered massive input lag when coding. Back then I have downgraded to 2020.2. Today I realized that I cannot convince the discord plugin to show my info in the status. Just for fun I've upgraded to 2020.3 not remembering the issues I've had before. Long story short it is the same again:

https://streamable.com/7eb4sf

As you can see input is veeeery choppy. This is 2020.02 after downgrading from 2020.03. I really would like to get back to my realtime performance of 2020.02 before upgrading :(