Hello, when there is wind, ground vibration, or other factors affecting the environment, it may cause the image to lose alignment, or if there are too few stars (less than 20), overlaying may fail. In such cases, the system will automatically discard the image and continue shooting.
The failure of Seestar overlay is related to many factors, such as environmental influences like wind and ground vibration.
If the target you are shooting is near the zenith, field rotation will be more severe, which can also lead to overlay failure.
Additionally, it is recommended to use the default 10-second exposure time, as longer exposure times can easily cause the stars to elongate.
Lastly, please check the level of your device.