I'm recording on both a IPM723W and a IP3M-943B to an SD card. Each camera is in a different home no where near each other. Both are set up to record full time and also motion detect.
Both cameras stop recording to the SD card for about 30 minutes starting at about 12:30AM. Neither are set to reboot anywhere near that time. Tech support reset one to factory default and it appeared to work for a day or so. One of the cameras are set up to also record to the pc-nvr. That recording has no issues.
I'm not using the latest firmware because the newest version has some more serious flaws with motion detect and time zones.
For the most part I've been happy with the hardware but the camera firmware and smart phone app have many flaws. Sure would like to see these flaws fixed or find another manufacturer with better quality control.