How to solve problems with the message history of customers spark 2.7.1?

Client Spark 2.7.1 I have problems with spark conversation history or messages. Not keep all conversations on. Just show some

Spark 2.7.1 Build 686 Ignite Realtime Apache License, Version 2.0 www.igniterealtime.org Smack Version: 3.3.1 JRE Version: 1.7.0_80

2.7.1 spark customer does not save the entire message history

Spark 2.7.1 Build 686 Ignite Realtime Apache License, Version 2.0

www.igniterealtime.org Smack Version: 3.3.1 JRE Version: 1.7.0_80