Thank you - I can not explain that, but in my case, it is reproducible on any camera any time I turn this option on.
I am using Intel+VPP, the latest BI+DS. Nothing really special about my config, all drives are SSD (so read/write is fast), CPU is 10% on average.
The manual trigger will cause the problem as well if this option is turned on (Hi res JPEG).
Correction: the only camera that does not have this problem - is a doorbell, AD110. Probably due to low resolution (it is 1080 camera)