i guess i've found some bug in the Version 2020.2.617.
I have upgraded from 2020.1.406 to 2020.2.617
after them it is not in the correct way possible for me to hidde or display the correct columns.
If i click the first or second column nothing happend..
after them i get the wrong fields to hidde or display.. if i use the old js files from your CDN
it works again, but i'm not sure what will not be working in our WebApp if i do so.