Safari not showing a text block

Site URL: https://seabass-vuvuzela-ynfj.squarespace.com/

I added css #block-yui_3_17_2_1_1597694605564_14382 
{
  column-count: 2;
  
}

and now this block is not visible in Safari 13 (catalina). On Chrome and FF, it looks ok. Any ideas?

https://seabass-vuvuzela-ynfj.squarespace.com/

Did you try adding

-webkit-column-count: 2;

Thanks rwp! i added it but it didn't seem to work.