The TrueSight Presentation Server takes a long time to load the Elastic Search data. This might happen because the Elastic Search is unable to find shards because the Indexer Server is not running on the other node.
Workaround
Use the tssh process start indexserver command to manually start the Index Server on the other node. For more information, see Presentation-Server-tssh-commands.
You can also resolve the issue by starting the TrueSight Presentation Server.