Symptom

In 5.20-SP5 through SP8, do not name cameras such that a prior camera name is a substring of a subsequent camera name (e.g. Group A = “Axis10”, Group B = “Axis100”). If this happens, the video files will be named Axis10 and Axis10_2 and Group B will not have a video file associated with it. 

This issue will be fixed in a subsequent release.