When this issue occurs it relates to a device losing the connection between itself and the station. We added this feature to automatically detect when the results are successfully synced or not.
It isn't an issue with Phonecheck software but, an issue with the communication between the device and the computer.
The disconnect can be related to the USB hub, cable, device charge port, or the cable be jostled while being tested.
If many devices fail to sync this can be a good indicator there may be an issue with the USB hub or the limited power supply for devices connected.
The options below will attempt to pull the device's results again
Tap the "Retry" button at the top of the app on the device
Click on "Get Results" on the Desktop indicated below
Try to disconnect and reconnect the device
If you continue to have the issue, please contact support