Apologize if this has been addressed before!
I was trying to do night sky shooting in southern NJ a few weeks ago, using one of the basic intervalometers with LCD I bought from Amazon.
I believe I set my intervalometer to take a shot every 45 seconds, for ~200 shots. My composition was set, and I was shooting in manual mode on the 6D. When I looked at my camera after time had passed, it simply stopped taking shots after 2 or 3 frames. The battery in the camera was fine, and the battery in my remote seemed to have juice also. The camera was still fully functionable, but had gone to sleep from lack of activity.
Any idea what could have gone wrong? Do I need to turn off Long Exposure Noise Redux?