I have a text splitted in 4 columns and it works perfectly in Safari I don\'t know why I can see just 2 columns in Google Chrome.
Tested with Chrome 55.0.2883.95 (64
From my experience with this issue i found out -webkit needs to come last (Otherwise I guess it tries to use the non webkit and fails)
column-count: 2; -moz-column-count: 2; -webkit-column-count: 2;