I have three Hikvision cameras (DS-2CD2132-I) and two Foscam cameras (FI8904W & FI8918W) that are triggered for recording motion (all controlled by BlueIris) with masking to try avoiding false triggers. The Foscams seem to work pretty well, but the Hikvision recordings occasionally freeze. In other words, they often will initially capture and record motion but then the person moving in the frame freezes and then disappears after having walked out of view. I have the buffer set up to record the motion from the beginning, and make and break times of 0.5 and 5.0 seconds. Any thoughts or suggestions about what may be causing this would be appreciated. Many thanks.