Why can't I change to different sections in youtube with multiwindow?

So I noticed the youtube all was updated and I always use the multiwindow option to multi task. With the new youtube update, all the sections are at the bottom. So when I try to tap and change between them when using multiwindow, I can't change at all.

crwdns2934089:0crwdne2934089:0 crwdns2934093:0crwdne2934093:0

crwdns2934109:0crwdne2934109:0

crwdns2889612:0crwdne2889612:0 0
crwdns2934285:0crwdne2934285:0