Confluence Whiteboard for PI planning

Hello,

I am planning to use Whiteboard for PI planning. The template provided doesn't really meet the purpose.

I have 9 teams which means I have 9 team level planning area. So, in the team level area I am trying to pull the team's iteration using timeline in a Confluence space with a table using JQL pulling respective team's features and stories. 

With this I am facing some issues. The embedded table in whiteboard is not displaying the table at all. Also I have noticed performance issue with whiteboard.

Any suggestions and recommendations 

1. Deal with the issue I am facing

2. What is the best way to set up ART board

3. Any better way to do set up the PI board

thanks in anticipation!