My first #CPAP therapy anomaly happened... I woke up at 5 this morning with the mask set aside. According to my SD card via the OSCAR app, it was about 4 hours before that, that I must have taken it off in my sleep, or I got up to pee and was so sleepy I failed to put it back on. In any case, I dont remember being awake at that time. I put it back on right away and got about 4.5 hours of therapy total.
As long as it is not a regular habit, I won't worry about it. I've heard that some people put on oven mitts to sleep until they train themselves not to take off the mask while sleeping.