Using QDSLR on a HTC Desire phone controlling a Canon 5D MKII. Interval is set to 6 seconds and is running auto holy grail for a sunset. After 283 shots with regular intervals I got a series of of intervals just after a shutter speed change: 6, 16, 2, 16, 2, etc for 16 exposures and then it went back to regular 6 second intervals for the rest of the timelapse.
This repeated on my next sunset. I changed to a Samsung S6 Edge phone and it happened again. Any suggestion as to what is causing this - camera? cable?