Hi,
Please check the parameter WAIT_BEFORE_DISCONNECT in site admin-> site configuration.
WAIT_BEFORE_DISCONNECT is the time interval in minutes that the ALM client can be inactive before it is disconnected from the server. Disconnecting the client enables the license to be used by another ALM user. By default, the value is set to 600 minutes. For performance reasons, it is recommended to set a value of at least 60 minutes. If you set the value to -1, ALM will not disconnect, regardless of how long the client is inactive.
Regards,