@sergey_smirnov Hmm, the 10 sec between the logs does lead me to similar speculation that it is being caused by the user. I would think they would be closer together if it was something the application was doing on its own (although I am not entirely ready to rule that out either).
That being said, it seems like just guessing unless you can get the application logs and trace the users page views for sure. Is that possible?
There is a setting in the Tenants for the Session timeout.
Tenants -> Edit -> OAuth tab -> Session timeout
Let me know if you are able to log the users page views.