I have been using all week and have experience similar issue of the device confirming start of recording then stops abruptly without informing me. By the time I realized the meeting was half way in. I had to start the recording again. It happened a few times. When the meeting is important, I make sure I watch my phone and avoid it going to sleep or if it is sleeping, make sure the timer is moving from Home Screen. This bug makes the device just extra work.