This doesnt populate often, but sometimes does. HELP

https://watch.screencastify.com/v/D8ETm01kyof4WdIyqIF4

When I create a tournament with random information and dont forget to pick a calendar date
add categories: master, pro, kids, ladies, amateur
then click next
try to add a division, once you hit add division, nothing shows up. this sometimes works and a lot but sometimes it works perfectly.;

Any Advice? It only does it on divisions! Never on my participant or categories portion of data entry