When a cloud device (cloud browser) is not operated for a certain period of time in the test editing screen, it will time out, and the device will be terminated. When this occurs, a dialog stating "The device has been terminated by the system" will be displayed.
The timeout periods are as follows:
For Browser Tests
Cloud browsers will time out after 15 minutes.
For Mobile App Tests
The timeout period differs between quick-launch devices and regular devices.
Quick-launch devices：15 minutes
Regular devices：20 minutes
Notes
Currently, the timeout periods are set to the above specifications and cannot be extended through settings.
If you would like to request an extension of the timeout period, please vote on this card:
Extend the timeout period for cloud devices
By enabling web push notifications, you can receive a notification when your cloud device (cloud browser) is about to terminate in a few minutes.
For more details, please refer to this help page: Web push notification feature