I am not sure if you've isolated/know the cause yet, but there are constantly lag-spikes on DayZ XBOX. Randomly the game just comes to a complete halt, no audio, no movement, and stays that way for typically 3-5 seconds. It then returns to normal. If you're driving, there is a 90% chance you'll crash.

One thing I noticed is that anytime the lag-spike happens, the weather changes. Typically changes in the following manners:

1. Clouds suddenly get very thick once the game resumes (less blue skies)
2. Wind either gets stronger/louder or quieter/less impactful
3. Environmental sound changes (goes from chirping to crickets)

I am pretty sure this is due to the sped up time on the server. Just wanted to point that out in case you didn't know the cause yet.

You can watch a video of this happening here: https://1drv.ms/v/s!AoZFxkhBS88Ujxc3kCmsmIX5nlTn